It seems to me (can’t know when this was implemented, but it was recently anyway) that Threadwatch has just put a robots noindex, nofollow on all user profile pages, like this one for example.
So what do members that never submitted a story (which gives you the chance to have a link as a small “give back reward”) get, who comment all the time and maintain most of your site’s content Aaron ? I always seen you against nofollow-ing.
I hope you’re not going towards SeoChat. It would be a shame.