Are you talking about on your car? Jesus whats wrong with those people over there..lol they take things really serious. your better off here
Well if the decals are on the body of the car...its probably going to take a hair dryer and a slow hand, then a few coats of wax..on the windows it dont matter how they come off..hair dryer, razor blade and some goo gone, etc...
Depending on how long they have been on the car you might see some slight discoloration in the paint also...
Let me know what you want to do..I dont have really anything planned for this weekend..id be willing to lend you a hand getting them off.