What the hell? No sigs?
Why not just make it like it used to be; limit to two links per sig. If people go above this limit then remove the signature. If they persist, ban them.
Completely removing signatures is going too far. After all, signatures are not soley for people to advertise in, they are used for other purposes.
Now I'm not calling it lazyness, but it's far too extreme a measure for a minor problem that could be solved with some active moderation.
What next? Only people with Silver membership will be allowed to make posts?
EDIT:
Oh yeh, and this will just cause people to add in-post signatures, which apart from being harder to moderate will make reading posts more inconvenient.