Just wondering if non-alliance (enemy) players are allowed to acs defend substantial fleets on your planets for extended periods of time, and what i should do if this has happened. It makes it impossible for me to attack my own shells to get at it, and none of my allies have enough fleet to punch through my defense as well...

Cheers, im sure this has happened before, id just like to know for sure what to do (i has screenshots )

this is a nice concept i've thought of before, if there is a single enemy that has an overwhelming fleet, you can acs defend them to protect your fleet, however they are likely to be able to catch you on the return if they are a good player, so its risky.

If you have a moon with a planet, an acs defending fleet defends both simultaneously, regardless of which it was actually sent to. So if you have amoon, next time have one of your allies attack your moon.