I disguised myself as a member of the powder gang to enter the NCR Correctional Facility the guard at the door let me inside, but once I get inside the Visitors Center he follows me in and starts shooting. After I killed him no one else tried to kill me until I entered the cell block then it started a chain reaction and every guard in the place was shooting me. If this is a bug then hopefully it gets fixed because it's ruining the game. Other than that issue I've seen a few Geckos get stuck in rocks, but nothing too bad yet.