Please do not promote your business in the forums unless you are an advertiser. This includes phone numbers, mechanic credentials, etc in your auto-signature. It’s rule #1 on the rules page at: http://www.vansairforce.net/rules.htm
I’m currently going through a list of offenders, and it’s as fun as pulling my own teeth without anesthesia....with a butter knife. Listing in your auto-signature that you can be found on another site under a specific name is a no no, also.
Sorry for the intrusion.
PS: It’s not an unusual request, and is a rather common rule in most larger forums. Examples from other sites: