One of the two reasons I don't keep a gun in the house. I'm not a big anti gun guy, they generally don't bother me at all.
But it is WAY too easy to have a depression episode, something pushes you a little harder, and make a really really really bad decision really quickly. Like what... 5 mins of "F this im out" and you can be done. All other methods take way more planning aka time to snap out of it or aren't nearly as lethal.