Odd we here have been talking about security and I just went in to watch TV and there was the answer, maybe. On the news they were talking about the latest fad in security. This is something being done due to all the highjacking of autos. There is a company now making law inforcement appearing dummys. Yes they are rubber and look life like. Full sized and you can possition them in the passengers side to have one arm on the window with a type of law enforcement thing on the arm. It states some kind of security company. I guess if you wanted to use this for coin shows you could drive up to one, park, push the dummy flat and cover it. Then on the way home, lift it back into position with the arm on the window sill. They showed several types and they all looked really scarry and life like. Aside from the usage of a rented car, this sounds like something to look into.