Myself and a friend appeared to have this exact issue today. We found a crashed chopper with weapons crate outside, we only started playing on the server yesterday and as it's a private hive and custom map I assumed this was relatively normal, so myself and my friend "filled our boots" only to be kicked seconds later. We now get kicked whenever we log on, no message is given however so there may be a different reason for this but is sounds alarmingly similar to shasocais problem above.