A single RH bomber could take out a navy gunboat/cruiser.
A single RH VHF could easily unshield-nuke/torp/razor a passing by navy fighter (and that tactic has been attempted by mercenaries and the like).
If they are banned it's because they can really be dangerous.
And okay, they'er no tanks. Would you let someone with full enemy battle armor, badges, weapons, etc, get next to your military and civilian critical areas, when you're one step from war?