Some people could get in serious trouble at work if they were seen with a webpage open that had pictures of nearly-nude cat girls and huge 700x400 blocks of FFXI text laden with profanity and raunchy linkshell chat which, due to FFXI's giganto-font, can be read from across the freaking room.
I realize there are no actual rules regarding this, but could everyone at least be a little considerate? Or maybe shrink your screenshots of text down a bit, at least?
(I think that any sig higher than 250px is pretty obnoxious too, regardless of the work-safe factor of its content, but that's just my opinion)