Damn, those cops sound like total dicks. Luckily I haven't been caught by the cops though. If you want to smoke in a parking lot got to one thats packed or has lots of cars in it. That way you won't look so out of the ordinary as the lone car in the lot. And for the record, I live in the states and have never ever heard the term "get rolled on" to mean get busted by the cops. In fact, i have never heard the phrase get rolled on until this thread. Good luck dude. Hopefully you won't be in too much trouble.