Flyertalk is my first modern IBB that I really frequented so I as accustomed to no attachments or commercial links, etc. I have recently ventured into other IBBs and have to say that I really do like FT's clean look and I don't feel like I'm constantly getting spammed.
I put a link to my facebook page in my signature for about 2 weeks a while ago before taking it out. I realized it goes against a lot of the anonymity that FT offers us.