Not sure if this is known... I haven't had time to follow most of the threads. if you'd like to remove signatures from comments (I'd like to see more than 5 comments in a screen...), copy and paste this into your location bar
and then press return.
That's all. This I think works for all sbnation web pages. You do have to do this every time you go to a new page though. I have a Safari extension that does it automatically for all pages. If there are interests I can post that.
The Safari extension used to do more, including collapsing threads, but there were minor bugs that I didn't have time to fix, and then after sbnation got the facelift it stopped working altogether and I don't really feel like fixing it...