Think before you speak, your words could hurt someone's feeling more than you intended it to.
Are you curious about cutting off your finger? Do you want to know what that feels like? To me, taking drugs is the same type of thing. In the end, all that happens is you get hurt by it.
I've had a few gigs where things have got out of hand and there has been a huge crush with my fans. They are important and I don't want them being hurt. They are a mad crowd.