problem drinker
Substance abuse A person who meets 2 of the 3 criteria in the last 12 months, for alcoholics. See Alcohol, Binge drinking. Cf Social drinker.
Problem drinker
5+ alcoholic drinks on any one occasion at least once/month–'heavy drinking'
One or more alcohol-related social consequences–eg, drunk-driving, public drunkenness arrests, alcohol-related criminal arrests, traffic or other accidents when drinking, confrontations about alcohol-related health problems by a medical practitioner, alcohol-related family or on-the-job problems
One or more symptoms of alcohol dependence–eg, having an alcoholic drink upon awakening–an 'eye-opener', shaking hands, awakening not remembering the events that occurred while drinking JAMA 1992; 268:1872oc
McGraw-Hill Concise Dictionary of Modern Medicine.
Actually, alcohol use even in officially recognized problem drinkers can be magically benign, or blatantly benevolent:
http://en.wikipedia.org/wiki/File:Possible_long-term_effects_of_ethanol.svg. There is nothing wrong with becoming intoxicated on alcohol once in a while (which I'm sure just about every single human agrees upon), so I'm not sure where you're coming from with that. Regardless, I certainly never said it doesn't pose risks. The difference between someone using opiates once a month and someone using weed or any other drug I listed once a month is that the opiate user, almost surely, will eventually stop, or use more frequently.
As I claimed earlier, opiate intoxication can readily depress breathing so much as to create BRAIN DAMAGE. Even if opiates were legal and standardized, they would be much easier to overdose on than the other drugs I listed. Here's a thought: the euphoria of opiates indefinitely increases as the dose increases; with the other drugs I listed, negative effects are almost sure to present themselves before there is any hope (used advisably) of death, whether the rapid heartbeat of cocaine or vomiting brought on by ethanol poisoning. With opiates, the perfect high most seek is near the overdose mark, and their body furthermore doesn't warn them nearly so urgently that what they are doing is dangerous (though its not like many opiate users dose in increments anyways, furthering its danger).
This thins about inherent endorphin deficiency is unproved at best; I'm sorry. I believe it can be created with long-term use of strong opiates/opioids, but show me a study saying that one can be inherently deficient of endorphin or associated nuero-peptides.
Damn straight your life has been easy! Opium derivatives are some powerfully intoxicating chemicals. However, that the system doesn't suggest them as a legitimate use for your mental strife means you will be living an overall less awesome life if you don't accept that you shouldn't use them.
Benzodiazepines are another topic. But its interesting that you bring them up. Opium derivatives and benzodiazepines produce withdrawals of comparable intensity, have similar addiction potentials, and produce high tolerance and dependence. More so, benzos seem to more reliably produce erratic behavior and physical damage to the brain. It doesn't matter, though. You are still better off using benzodiazepines, because they are accepted by government. You know, beyond all the realpolitik, one has to wonder if there is a genuinely good reason that government keeps benzodiazepines accessible for mental disorders and an equally good one for making sure that opiates/opiods are only useed for physical ones.