It makes you a recreational user, druggy is a slang word meaning drug addict, not drug user.
I don't think I said that, I thought it would have been pretty obvious that I didn't mean it was fine for everyone, I thought you were talking generally, not specifically. At 12 smoking or drinking is a bad idea really because in a lot of ways your body is still developing and isn't as tough as an adults yet. (They say that people who start smoking at 18+ generally have less of the side effects than someone who started at 14, per fag smoked).
Personally I have never smoked it, but that's just because I don't fancy it. I know several people who smoke every now and again (like less than once a week), and it seems to have no adverse effects on them at all.
There's no hard and fast rule, obviously you'd be better off health wise just not smoking at all, because smoking is bad for you, and when you smoke a joint, there's tobacco in there as well, but in that vein you could say you should never drink because you might get drunk, and you shouldn't eat "naughty" foods because you might get fat. You've just got to weigh up the risks and if you're happy with them, do it.