According to my browser, you have a total of 1.5 _meg_ worth of animated gifs in your sig. Would you mind cutting that down? I know you're not the only one, but this was the one that bogged down my network this morning... Sigs are fun, but c'mon people, let's try and be reasonable here.
There's a phpbb mod that allows you to filter images in sigs... I think it is configurable so each user can set whether he wants to see them or not.
No, but those who like to browse the site at work might not want to piss off the network admins by pulling down huge freakin gifs.