bradley_phil - 12:26 pm on Oct 30, 2005 (gmt 0)
I personally wouldn't nofollow all links. Yes, it'll protect your site from linking to bad neighbourhoods. On the other hand, it's effectively telling Google + co that the content on your site isn't under editorial review (whereas, to a certain extent with the moderating team reading posts, it is), and that may cause it to disregard or devalue the content of your website. It's just a personal theory of mine - a nofollowed link in a block of text may have influence over the whole block of text (in this case, post). After all, why not?