Honestly the band, especially chester, have a ton of reasons to stay away from anything like that. First rule of addiction recovery is to stay away from the sources of your addiction. My guess would be that LP's tour manager details keeping that stuff away when they set up the shows. Sublime ignored it (because no shit, it's sublime) and something is said to one of the local crew. Standard procedure would be to have security remove the problem aka "cops". Obviously they didn't just call the cops or it would have been a bigger deal than it simply being removed from the shared backstage area. I know there was a time for me when having drugs / alcohol around would have turned me into a fidgeting / craving anxiety ball, and totally ruined my ability to play a concert. I know the illegal thing had nothing to do with it by itself. Was talking to the security guys at riverfest yesterday waiting on buckcherry/three days grace to set up, and apparently they are specifically told to ignore that for artists. He specifically mentioned snoop dog last year. It's a condition of booking him that the cops and security look the other way. Would make sense that some bands would have the opposite.