Edit: As of today, (03.23.05),
it's not huge or anything, but there are some people that i feel don't read/comment in mine, and/or i don't read/comment on their stuff... so there's kind of no point. if you have an inkling you might be one of those people, and you want to stay.. comment.
actually, if you want to stay on.. comment. i'll probably use my own discretion anyway, but it's the safest bet, just so that I know who reads and who doesn't.