Don,
I'm just getting done and have not yet driven mine but I totally share your feelings. It doesn't help much to know that if someone wants it badly enough and has the resources (tilt trailer, etc) there is little that you can do to keep them from getting it. I'm thinking of having some small stickers made for the side windows, like the "No Firearms Allowed", but more like the 45 engraved around the barrel, "Smile - Wait For Flash", or maybe a normal NRA Member sticker is sufficient...