I've had the patriotic Mickey on my Ford Windstar since May - no damage, no theft, and the van must have a pretty solid antenna, because it hasn't bent the antenna back either.
That said, I live in a rural mountain setting - not a high crime area. We do have a Walmart in Littleton, about 20 minutes away. I go in there at least once a week or so, and no one has bothered with mine!
I have a couple of others - waiting for the appropriate season - I need to go get some more while we visit in December - I only have non season specific, and the sunshine Mickey. I need a Christmas one!
Good Luck!