How sad toppers were stolen!
I bought a Nemo 3 years ago and is pretty worn. We had a few close calls when he popped off twice in a carwash. He's VERY faded and I think I'll finally replace him this year.
I don't think I'd ever consider taking it off when I park--the main purpose I bought the bright orange Nemo was to make it easy to find vehicle in a parking lot!