Ok.
The question you pose is very complicated.
Drugs are drugs, this is true. Yet though perhaps the most common use for "drugs" is to get high, people still use drugs for various reasons, many of which overlap.
Allow me to seperate the typical Steroid user from the typical Heroin/Methamphetamine user.
People that use steroids oftentimes have a certain vanity regarding their body. That's not a bad thing, they just want to look good and be strong; much of the time they're also looking to indirectly improve their ability at some sport or activity that involves strength. In and of itself, fine.
Now take something such as sports. Around the world some people don't like sports, some like them, some love them, and some absolutely die for them. I contend that sports as a social organization has the status of religion in a large percentage of sports followers insofar as a significant portion of fans go to all kinds of lengths to see their team, become exorbitantly engrossed in the "winning" or "losing" nature of their team, and can be witnessed ardently defending their loyalty to their team and its players. Imagine the very fiber of this religion, that being "watch the physical prowess of our species at this (not game, but) wondrous event", defiled by the very beings which are worshiped in it. To many people, that's like a Jew burning the Torah or a priest destroying a sculpture of Jesus on the cross. And for money. These players were generally in decent standing, and would've already had technical skills enough to probably make a lot of money playing ball, not all, but most. No, they choose to take a few more million and stick the finger in the faces of the fans. This is pure greed.
Beheading every heroin/meth addict would be a way to get drugs out of cities. But its not the best way at all.
Now, the heroin/methamphetamine user. There are people who become addicts who were leading healthy, productive lifestyles beforehand, then tried the drug a couple times, and finally said "fuck it I want to get high all my life and be a hedonist", finally ending up on their mother's couch a mess and with no contribution to society. But there's already such a word out on Heroin and Methamphetamine that you can bet basically every middle school kid who's taken health class will shy away from it. People who will become Heroin/Methamphetamine users start with prescription drugs, manufactured by corporations and approved by our government, those being the like of codeine and methylphenidate. These drugs can be stolen or perhaps they were personally prescribed, and rarely would a kid at that age have a connection to buy them.
What you have to understand is that many people who went through a lot of shit when they were young, whether they were pretty poor, were raped, have family addicted to drugs, have an insane mother, or whatever (and usually many of these factors coincide), that these people physiologically are A LOT more likely to feel the addictive nature of drugs and want to get high, just to escape the pain; they've been rocked in a hardcore way at a young age. Getting high is obviously a stupid way to try to cure one's problems, but without the proper outside support, one's "primitive center" in the brain makes it all but impossible to resist just a little escape. And then because that worked to try it again, and again. These people feel no loyalty to a system or society which fucked them over so much. They don't care because they're blinded both by pain and by the prospect that it can be so readily relieved. Some want to be beheaded. Of course, this is no way to go, ever.
Recently, its become clear that addiction is a disease in the same way that bipolar and obsessive compulsive disorder are diseases, but more importantly in the same way that influenza and bronchitis is. Yes, they all have a physical basis. The vast majority of drug users had a mental disease which was not treated properly or at all before they developed addiction. The temporary relief that the drug brings in light of a troubled past is oftentimes no match for any logical block which would disable addictive tendency.
Countries which have cheap, governmentally assured healthcare and by-and-large treat addiction as the disease it is have a lower incidence of drug use and degeneracy. Countries which treat addiction with contempt just end up hurting their citizens. Look at Russia: it disallows methadone maintenance therapy, making people turn to a disgusting concoction when heroin becomes too expensive or otherwise untenable which essentially rots the user from the inside. Is that really a good thing for a country to do?
More importantly, would you really advocate killing every heroin/meth user?
The problem is decidedly not the drugs themselves, but the social circumstances that prod people toward using these substances. You can agree with me or not, but either way, the statistics show that approaching the issue from my/the sociological-compassionate perspective leads to a better-functioning society.
We live in a crazy, gruesome world. Still, America stands as relatively democratic. If somehow, despite our educated masses, a law could possibly pass which would deem all addicts eligible for death by virtue of them being addicts (forget beheading), that would pave the way for not only at least tens of millions of people protesting enough to shut down the country for a while, but many more laws which would kill people for things that aren't really their fault. (Do you know that only a very few people have ever been executed due to crimes which didn't involve killing people? And they involved giving nuclear secrets to the USSR.) Then their would be abuse of power not even based on the law, and violence would be all over the place. Yes, this is a slippery slope argument. You must concede though that once a law is in place laws of similar nature are less "abominable", therefore more socially acceptable within the population that makes them. It would totally upset our democratic balance, not to mention the Geneva Conventions.
I am trying to relate to you a popular misconception regarding drug addicts.
I hope you understand that relatives of the drugs in question have legitimate medical uses (methamphetamine itself is actually used in psychiatry). They can and will always be diverted to unscrupulous ends. There is no way to banish recreational drug usage unless you want to put a camera everywhere and increase government domain; this of course has problems of its own.
I'm not against any class of drugs. I think everyone should be allowed what they want. I'm against using some classes of drugs in certain venues. I want steroids out of ostensibly steroid-free sports; I want military fighter pilots depressant-free while on a mission, I want surgeons absolutely clean when they're doing a biopsy on me, and I want my president booze free.
Nothing is simple.
I NEVER recommended killing steroid users, EVER.
