If you park like an asshole, I think you should be sited for it. Luckily, youparklikeanasshole.com exists with not only some notices that can be printed out and put on cars, but also with a gallery of people that park like assholes. There's a guy in my building with a relatively nice car that blocks 2 spaces every morning and there's not a lot of parking in our lot -- there are people in my building with $100K cars that manage to fit in one space. This weekend some jerk parked so close to my driver door that I had to climb in the passenger side and there were 3 empty spaces on each side.
Feel free to print out some of the notices and keep them in your car -- I like Notice 1.
Link -- youparklikeanasshole.com