I'd like to know what are some obvious and not so obvious signs of someone being an undercover cop. I have been pretty dry lately and lost my connections long time ago. I recently had a guy offer to sell me some at a bar but I was paranoid so I declined. I really wanted it and I really thought of purchasing. I think I was even drooling a bit when he showed me the bag. So if anyone know...how do you know when someone's a cop?