Well, obviously, people who aren't posting aren't an issue and it would simply take too long to edit over 3000 people's sigs.
I've been PMing anyone who I've seen with a large sig and have personally asked them to cut it down. Now that the "grace period" is over, so to speak, if I see anyone with a large sig, I'll PM them. If they don't do it within I'd say about an hour or so, I'll edit it myself and e-mail them to let them know.
Dames