I dont know the answer either but banning things in town doesnt solve the problem it just moves it on.  Follow the path behind the masons pub on chatsworth road, behind mecca bingo upto just before chester st where the gas tanks are, land there has been broken into for a live example...and thats been since the introduction of the alcohol free zone in town...out of sight and out of mind!! Personally think the law needs changing, stop thinking of these bods as crims and understand why they are doing it in the first place