Just give it a nice "repaint" with a message.

if i was walking along that path, i'd be sorely tempted to get my shoes a bit muddy, then hop up on the car and walk across it like it wasn't even there. oh, and sorry about the dent from when i hopped up, sir!

maybe someone stole that car and left it there. better report it to the police. just saying.

Why am I not surprised it's a BMW...


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A Molotov springs to mind