Give them the facts from some reliable places. Tell them your personal experiences, tell them how to do it in a responsible manner, and get off their NUTZ!!! If they don't want to do it after that don't pressure it. They obviously are having a good time without drugs and I think it is great if people don't want to do it, just as long as they arnt' bashing those who do it in a responsible manner. I know I wouldn't want to have myself to blame if I didn't give them all the facts and they ended up rolling every weekend and causing damage. I give my friends the facts meaning the pro's and the cons and let them decide themselves.