I would have to agree, that the main cause to violence we have all been unfortunate to witness on our streets at some time or another,

is not purely drug related as most media would like to blame.
Mix alcohol and drugs in some of these young binge drinking teens that are unable to handle their drugs or grog, and we have our average patron in Newcastle. The guys that want to fight over the girls that are in the garden vomiting. While one of their friends has had a bad pill and is on their way to the hospital to take up a much need bed, for a more deserving person, its a disgusting sight.
Alcohol related crime in Newcastle may be down 37% in their statistics, but I can guarantee that there is a lot that doesnt get reported. In Newcastle there is a level system in place and all venues have a 1.30am lock out. If your venue is placed on level 1 restrictions, its due to the fact that the police have attended to too many alcohol related incidents.
So to avoid these restrictions most licensees of the venues advise Security staff not to call the police, without asking the manager on duty's permission. Now the last time I looked at the majority of Security Guards, they were either the kid that got beaten up at school, or some fat dude that cant run 4 steps.
Not to mention the fact that the hotel's main aim in to make as much profit on a weekend to make up for the slow week, or the times that they are closed.
In doing this bar staff will not refuse service to an intoxicated patron, and when the venue closes they are all pushed out on the streets, in most cases leaving them locked out of all venues, creating a irate intoxicated patron, that decides to vent their frustrations on the next person that looks at them the wrong way, or the Security guard that refuses them entry to the next venue they try to enter.
The police need to start and enforce their policies and start fining the venues, maybe then they will responsibly serve the patrons. I do agree with the lock out system but then I don't see the need for venues to be open till 4am either, why not look at raising the drinking age to 21. Legalising drugs will not solve everything, but there are some drugs that should be legalised, considering the drug company's make most of them, and expect us to feed them to our children.