Wow. I didn't expect this many responces. It certainly makes me feel better about being a clean YA author. I've also been thinking that drugs and swearing are more likely to appear in YA contemporaries, which I have been reading for a few months now (contemp. thrillers), but in SFF there might not be alcohol or drugs. In tighter, fast paced stories, characters don't have time for those things. Swearing, maybe, but my characters don't have to time for a smoke break while trying to escape an alien spaceship.