The jailcell / double story building (not the radio tower but the double story with the little jailed room to the right as you enter on airstrips) has a spot people are going under and just camping under all day and coming out as you go in the building, one of them even talked to us after they killed us telling us "they werent hacking, just using clever use of game mechanics which is rather pathetic and probably the fourth time we've encountered this. I think they bug out by crawling under somehow and they're able to run through the wall at any time to kill you.