The world is divided into two types of people: those who can park a car properly, and those who like to be hated for asshole parking habits. Fortunately, the latter category is the smaller of the two groups, but there's still enough of these rude people around to piss off the considerate majority. As you can see from this list compiled by Bored Panda, however, people have found a variety of funny, creative, and passive-aggressive ways to enact their revenge on these thoughtless people.
We applaud these common sense warriors for not giving into some form of road rage and smashing the violators' windshields or keying sides of their cars. In many instances, their funny notes even saved the asshole parkers from parking tickets, so hopefully, they'll park with more consideration next time.