Pssh. I'm not scared of spammers, that's what word filters are for.

But I understand that value of paid for advertising. And I respect that.
Still I think members who have spent a long time being active , deserve the privilege of advertising in their signature.

It is just common courtesy in my opinion, and the precaution allows this forum to stay safe from spammers.If you are going to allow a chat box someday ,I don't see why this could be any different. (Chatboxers invite spammers as well and could pose a threat to your members in the same fashion.)
Thank you for answering my question.