It really is getting boring. Dull, dull, dull.
I'm not clever enough to work out a formula myself, but would removing the name-change function stop trolls being able to hide so much ? I appreciate this may have a negative effective on those who wish to remain anonymous, but maybe the upside would be worth it?
Another option - would having a flag that said "first time poster" help on an OP? or the number of posts an OP has made?
Too many times recently I read an OP and watch many posters fall into the abyss of answering honestly to a thread that has all the marks of a hairy keyboard sad twat.