You might be able to keep people from tailgating you with the Star Wars Keep Calm Dark Side Decal. Why? Well, they might remember that Darth Vader has the ability to invisible choke people through the power of the Dark Side...and 'road rage' is probably a quick and easy path to said Dark Side! At 5.75 inches high, the Star Wars Keep Calm Dark Side Decal could also probably be placed on your TIE Fighter. Probably.
