I actually had a customer a couple of weeks ago tell me I should do that and volunteered to have the first one put in his yard and leave it for a few weeks. This guy was a school teacher but had a real interest in marketing. He basically said like Brian said, just having the sign in the yard was as good as a referral or endorsement. I thought about getting about 10 and just putting them in choice houses in choice neighborhoods, with permission of course. I can't see any reason most people would object afterall they already do it for roofers and such. I'll probably try it after the first of the year.