By Joseph Salvador Before Monday’s game, he says he walked right past security and started shooting around on the court. Back in the beginning of the Warriors dynasty, you might remember a certain fan who looked eerily similar to Klay Thompson in the crowd. Dawson Gurley, the fan dubbed “Fake Klay Thompson” by fans, shared a picture on Twitter after the team’s Game 5 win Monday that said he was banned for life from the Chase Center after an apparent stunt. In the letter he posted, it said he “deliberately deceived Chase Center building personnel by impersonating a GSW employee.” In a later twe…