I put additional info on four places on my car about my company and my services when someone wants to contact me. It generates business. http://www.photo2be.com/kort.htm
Good point. Indeed, I have had a lengthy discussion with my son on this very topic when I suggested that I advertise my business on my car. He pointed out to me the very thing that you said. In the end I opted to put a poster in my rear windscreen attaching it with Blu-Tac so that it can be easily be removed if I park it up somewhere out of my sight. (In the evening it is garaged so no-one can see it there).I would be careful advertising that you have $1,500+ of electronic equipment in your vehicle.... Even if you have taken it out of the vehicle...the bad guys do not know it.