Meanwhile in Croatia we have a true douchebag

Douchebag lvl 100000000

easy solution: when the person comes out of the store, MAKE them a handicapped person.
Or, to be less violent, remove the wheels off their car and put them in a normal parking spot. Without lug nuts.

Write "douchebag" on their car with a key. Or call the police and make them lose their driver license, or at least make them pay a fine.