I have no real use for what you call “clarity” and I see no need for people to negotiate the terms by which they prefer to participate in a message board. After all, you have said it isn’t a community in any real sense of the word.
My own terms are these: I come, I read, sometimes I poast. I respect the privacy of private messages, if I read them at all. I detest the use of personal or RL information being used against any poaster. And what I poast, and where I poast it, is my own business.
As for the “dead” trope, it was first introduced in this company by Lotus, on a different forum, some time ago. It’s not my invention. Still, as I understand it it seems to operate as Roose suggested, with the dead poaster trying various means to get the ignoring poaster to recognize him…so as to gain pwnage. It’s far easier just to ignore the poasters I don’t care to interact with, rather than declaring them “dead.”