I have to agree more with Deb, drivers who stop in stupid places just because they think they are being nice are almost as scary as the ones who are really rude, because when you refuse to take their "nice gesture" you might be creating ill will with the driver, so who knows what they will do next time.
What they don't seem to get is they are doing something dangerous My husband and I encountered one of these people just two days ago. They stopped and waved us on into the path of traffic coming the other direction. They get so fixated on the bikes that they forget we have to deal with all of the other traffic that is not their particular car.