I've disabled commenting by Guests on posts older than 30 days. I'm starting to get a lot of spam posts. If you log in, you shouldn't have any trouble posting on older messages. I really didn't think it would be a problem, but I under-estimated spammers.

I've been aware of the potential for spammers, and that's why I've not output people's contact information yet. If I do, it'll be in a GD image so that at least it would be harder for spambots to nab it.