How do you use Drones?

[Power Man]

I have used them a few times as colony killers.
If I am sharing a system with another player I will build some planet attack drones on all my planets. Then when War happens, and it usually does, I launch all the drones and attack his planets.
This works best against those AI's that tend to have lots of little colonies. They usually have no defences and can be cleaned out in a hurry.
I get rid of the enemy in the rear without having to send in a fleet.

[Atrocities]

The thing is they are great if the planet has no defenses. The bad thing is, most planets have defenses early on so this negates the need for planet killing drones. In fact drones should be hard as hell to kill, cheap, and deadly, but they are not because then they would become the optimal weapon of choice for many planets. And lets face it, what fun is it to log onto your PBW games only to give orders to a bunch of drones?