I too have met this car. Concours d’elegance at Rancho Palos Verdes 2014.

As a control in your liberal sticker experiment, I’d suggest trying McCain/Palin and Powered by Whale Blubber stickers.

“And I am including in this statement... vehicles I have driven in dreams, etc. “

Perhaps the McLaren decided to end itself due to the shame of having a giant McLaren sticker on its windshield?