Thank you, @whatsup, for your further explanation of your issue with being editable...

I think I understand better now where you're coming from. And of course, I would find the behavior you just described to be completely disgusting and reprehensible... However, I am of the very strong opinion that prohibiting editing is not the solution to behavior like that...

The answer to that kind of nastiness is to flag the hell out of it. Also discussed in some places, and perhaps not properly settled, was the real need to separate "voting" whether up or down from "flagging" semantically, i.e. to have a separate function called "flag" that would be a way to disapprove of such antisocial behavior as you've described...