It was discussed some time ago…
Droping a big ship or other stuff is a legit way duing an attack. They spend somehow resources for it so it is just a way to play war. Since the human history it is a tactic during a war to have a kind of battering ram.
It is PvP after all so make sure what you have placed there, have always backup locations. Especially Bases.
Nevertheless let’s see how it will be in 4.0 with the new meta changes.
Ammo draining just means throwing his body or the F5 drone into turrets with intention over and over again.