If two people want to blow up a tank this way, they will definitely do it. You can kill 1-2 drones. But in any case, they will get you without the need for accurate shooting with an RPG or without the need to take risks and run up close to stick c4 on you. This is too simple a method. All you can do in this case to survive is stand at the spawn.
#Remove the possibility of C4 sticking to the drone
near steeple
or increase the weight of C4 so that it is impossible to blow up a tank with just one drone