Drone bug with a sledgehammer
The drone can carry friendlies to buildings inaccessible to those without a heli or jet to get to. They are having a friendly jump on it and hit the drone with a sledge hammer causing it to launch in...
Ideas
Had a game today on the very map you screenshotted with the same problem. There was a squad on attacking side (I was on defending side) using the drone-sledge exploit to get up there as well as the bridge above and various other non-accessible building roofs. It was really frustrating and they were laughing about it in /all chat - myself and a bunch of others in the lobby reported them. Anyone abusing this should be banned or at the very least temp banned and have their XP earned doing this revoked. They're cheaters by proxy for exploiting a glitch. PLEASE fix this soon!
Lol who was it? What was their names?