Because teenagers are stupid!
Logan Shaulis of Somerset, Pennsylvania, may be the stupidest teenager/man/human of all-time. The 19-year-old was driving drunk when he decided it would be a good idea to pretend to be a police officer. Shaulis didn't want to be any old patrol cop or detective, however. No, he wanted to be a cop manning a DUI checkpoint. So, in his infinite wisdom the teen parked his car diagonally on the highway at 4:00 A.M. and started dropping road flares to get cars to stop.
One car did stop and Shaulis asked to see the driver's license, registration and insurance. Eventually state troopers came and put an end to the madness. Pretending to be a cop manning a DUI checkpoint is an awful idea if you come up with it while sober. When you decide to do it while drunk, well that just makes you the dumbest person alive and deserving of whatever punishment you get.