I don't think I've ever found anything on my car, aside from bird droppings.
But in December 2011, there was a Washington EV task force meeting in Seattle. Three of us from Plug In America met at a Redmond mall parking lot and carpooled in to the meeting. When we got back, Dan's Leaf had a tin of Christmas cookies on the windshield, with a note that said something like "Good for you! From the EV crew".
I'm still hoping the Cookie Fairy will visit me some day.
- - - Updated - - -
Oh yeah, there was the time in April 2010 that I pulled in to a campground in San Diego, and a guy across the way walked over and introduced himself. He said he worked at Tesla (in Fremont, but he was on vacation with his family). He worked on the Model S, but he thanked me (as a Roadster owner) for paying his salary, and gave me a beer. Not quite the same being from an employee rather than a lustful consumer, but it was still very nice.
Mmm, beer and cookies.
