If one is a long-time member (over 2 years) one can PM DocJohn with a post one wants to leave and get that approved; presumably you have 82,000 friends by then, if a long-time member, so PMing would be harder/more complicated and potentially more damaging than a post.

I have more trouble with people starting posts and then erasing the contents than I do with people leaving/threatening to leave. I would much rather have someone "warn" me they were thinking of going than write a post and not allow/trust me to read it. Talk about the rug snatched out from under one? At least the extant post gives something to me, if only sad information?