FranticFish - 1:08 pm on Mar 29, 2010 (gmt 0)
All user generated content should use rel=nofollow tag. Unfortunately this won't stop the spam.
Correct. Nofollow is lazy, and it's not a fix.
1) Doesn't stop bots or humans spamming you, or wasting space with 'I agree' or 'Great post' comments
2) Text in nofollow links is still indexed
3) Nofollow bleeds PR (at least Google says it does)
Even if you don't allow links (which I think is daft), the only solution is to moderate your content - and some of that has to be done by hand.
If a site isn't moderated then why should I bother visiting it?
Automated systems encourage spammers, NOT the other way round.