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
This has been pretty standard in bf games. People getting in places to have an upper hand. find a creative way to deal with it or avoid.
I've played since BF2, it's never been quite so egregious as this, especially with the addition of inaccesible skycrapers and bridges. Your reply of deal with it or don't isn't particularly good discussion or helpful to the situation at all.