>>Now I still do not believe this should be banned. It is perfectly acceptable to have links in a message or in a signature block. What is difficult is knowing when it is a part of the message and when it is a part of the signature section. What would be helpful though would be a way to clearly tell when the signature section begins if the user has not entered any name in their signature, but only links. Otherwise, it does appear that the links are a part of the message and not the signature block. Frankly, the user may not even realize it.

How about giving the signature its own CSS class, so instead of P with blue, have a P class="signature". And make the background somewhat darker, just enough to be distinctive, than the message itself. Then we'd know that it's the signature.