I'm not leaving.
I'm still contributing.
In the two + years I've been here (not reflected in my join date) I've NEVER had a confrontation with administrators... never had an infraction... never had a thread locked or deleted. And I've had a few 1,000+ reply threads.
How many else of you can say that
The people that have been leaving have been leaving as a result of their actions in one way or another...
Most of the people 'leaving' or 'left' I won't really miss... because all the cool people are level headed that don't butt heads with admins/other users.