I've never had any problems with any exotic and I drive what I own every day and park where I go whether it be grocery store or shopping mall. Never had any problems except the following:
1.) Overnight hotel stay out of town with a Hummer H1, broken into (
www.slantback.com click on blue slantback and then breakin pictures) -- they were after the sound system stuff, the fact that it was a H1 was consequential.
2.) Shopping cart dent on my lexus sc430 -- simple one to pull out anyway.
That's it, and that's an 8 year driving record there.
I find that more people are respectful and cautious about the Diablo -- this is from usually parking if possible within a birdseye view. Even kids here know not to touch.
-Ben