"Posting & Toasting" Looks like a good site, especially for those who want to be long-winded - looks like you sort of make a blog post and people respond to it. Triple Threat would love it.
As regards the posters we've lost.... Without specifying any particular situation, I think the mods here are quite tolerant. Speaking for myself only, I've observed that the people who've left more permanently were thin-skinned and uncompromising. Either that or they were incorrigible trolls. Even so, it appears that guys who want to come back have been given that opportunity, sometimes numerous times. (I say this as someone who has been around nearly 10 years. Cripes!)
Otherwise, I don't think we've "lost" a lot of good posters. I think a lot of posters probably just got burned-out on posting. It happens. Sometimes I think particular threads have caused bad feelings (specifically the political ones) and people don't feel like coming back for a while.
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It's not so hard.