Bodybuilding does attract weird people. Ever been to a bodybuilding contest and check out the crowd? I think one of the problems is that bodybuilding is filled with insecure males who will risk health with syringes to be considered a man. When they go off the juice the praise isn't there giving their ego a pat on the back for their temporary drug muscles. Then it becomes a long time of cycling drugs in the life style that only ends due to health, finances, or arrest.
It seems lately that many insecure guys are going to the jui jitsu dojos instead of the gym. At least it's a positive activity and promotes health.