"Just for fun" is not a legitimate reason to do things in your world? Seems to me that would lead to situations of no trips to Disney World, no new bicycles for your kid's birthday and a myriad of other things that do nothing other than bring a little happiness and fun.
I'd wager most of the guns bought don't have a "legitimate" need. I mean who legitimately needs another 9mm when they already have ten of the things.
I have a friend who has a .458 Winchester Magnum ... I've shot it once and he can have it. He's never shot it at anything other than southern Whitetail deer and admits he'll never go on safari. But he wanted it, it is a beautiful early '60s gun and it is fun to see people's faces when he touches that thing off.
