The presidential and VP candidates are public figures and should be discussed by the electorate--that would be us.
While trolling is a problem--specifically that person who can't stop linking to exurbanleague--you're also effectively shutting down threads that aren't dominated by trolling and sockpuppets.
As for registering--I've considered doing it a couple of times since I do post under one names, but you guys want too much information. As I've been cyberstalked in the past, I am wary of giving out that sort of information. Other sites with registered users don't ask for my address. Ask for e-mail and a codeword for logging and you'll get that. The rest, I don't think is your business.