I see many have voted yes but i haven't seen anyone say why they think we should do so, surely, at least some of the people who voted in the poll have a more complicated answer than "they're bad"...
Several theories in political philosophy are based on the idea we have a natural right to do absolutely anything we want (absolutely). We only then start carving away at the rights people shouldn't have (that is we start out with a full set of rights and remove some of the harmful ones, rather than start out with the explicit assumption there are no natural rights and we choose what to *allow*) right.
So, take personal property for example. In some natural state, i could wander into your house and just start taking your shit or eating the food out of your fridge. Of course, that would lead to chaos and make living extremely hard, so, we take away that (eg. make it illegal). Why should we take away the right for people to own guns (not that i necessarily agree but it'll keep this thread going) ?