When I owned an MGB, I used to leave the top down so that theives wouldn't have to cut the top to get inside . . . besides, they could see for themselves that all I had was a cheesy AM/FM radio. However, one day I found that my rubber floor mats from MG Motors had been pinched. Not a lot of money, but it was disturbing to think that another MGB owner was the culprit, since they are pretty specific to the car.