Even better solution
Crayola Washable Window Crayons - 5-count https://smile.amazon.com/dp/B001QKNOZQ/ref=cm_sw_r_cp_api_glt_fabc_WXG4NRHPVZP31XM3HA1G
Write in his car so they have to wash off the shame themselves.
As you can see, this car is clearly an Autobot
Therefore it can park wherever & however the fuck it wants.
There are no parking slots in Cyberton..
https://www.amazon.com/dp/B00S9RB29O/ref=cm_sw_r_cp_apa_i_GjIiFbA7GX6G1
You want to make sure you get one like this that is water soluble. There are tons that aren't. But it's your choice what one you want to get. Also your choice what you do with it. I use mine for work related things.
Another solution. Position the car where it can’t be driven out. Fuck ‘em!
Always keep a few of these in your glove-box.
GODESON Tire Air Deflators for Offroad Vehicles,4 in 1 Solid Brass Easy Storage and Using Tire Air Down Tool https://smile.amazon.com/dp/B07X8VY6QD/ref=cm_sw_r_cp_api_i_i6-pFbCW0MYS7
This should help
Am I the only one who drives around with one of these in my car, to ensure I have the proper tire pressure?
You Commit Three Felonies a Day (The Wall Street Journal)
Or if physical books are more your speed...
Three Felonies A Day: How the Feds Target the Innocent by Harvey Silverglate