On one occasion at Red 1 Chislehurst, we finished a game and were about 10 to 15 minutes into the next game when we came under fire from one of the villages, which was not in play in the current game but had been the objective in the previous game. The marshals had not told the few players still defending the objective that the previous game had ended.
After a few poor experiences, including excessive waiting around, marshals not knowing the rules for a game, the site owner failing to take action after a player shooting at wildlife threatened me for reporting him after he refused to stop doing it (it was clearly stated as being a serious offence in the brief), we finally walked out on a day when a group of players, including my son, reported a player for repeated non hit taking from grenades and BBs. Junior marshal called in the boss marshal who aggressively bollocked the complaining players for not taking their hits and refused to listen as they tried to tell him that they were the ones who had reported the non hit taking.
It may have improved; hopefully it has as it is a cracking little site.
My eldest son worked at Bunker 51 for a while; it is/was a literal death trap.