Joe Friday,
You make a good point, but one that I find myself disagreeing with no matter how I look at it....it's a forum we have here, and if one were to extinguish expression of opinion, then it would cease to be a forum, and would rather become a pulpit for a few.
This site is remarkably devoid of idiots, and as others have said over the past months, it seems an island amidst the raging sea of fools, trollish and inane.
I really look down on swan songs or 'suicide notes' as such...they are just far too melodramatic. I would say that it is far better to go quietly, especially since most likely the person writing the swan song almost invariably comes back after a time, thanks partly to the 'pleas' of his friends. To say that the person will then look foolish is too extreme, but there is an element of the absurd in the return.
There is a forum I used to frequent daily, almost to the point of obsession. A few months ago, due to some incidents involving members, it gave me a very sour taste to even look at the site, much less participate...I simply stopped posting, and reading. Problem solved!
As in life, if there is a problem, it serves to deal with it. Especially when your friends or family are involved, you deal with a problem, otherwise it will most likely fester for a long time to come.
I imagine that if one of your neighbors were to start yelling in your window at 4 in the morning, every morning, not too many days would go by before you invested in a paintball gun or a box of rotten eggs....you would be silly to simply pack up and leave, because the person is a 'troll.'
Either way, Cheers, and I wish you the best.