Not something I did but my brother knocked on the door this morning and as he was coming in he asked me who keyed all the sides of the R I have while my car is in the repairers. Went out and 5-6 wavey lines down both sides of the car. I nearly burst a blood vessel.
Turns out my dickhead of a brother thought it would be funny if he put dental floss on the car. Didn't half look like scratches though.