I've got to say, banning is a step in the wrong direction. Have a 3 strikes system or something, but not an outright ban if they capture one ship. There is too much room for abuse of the system, unless the devs can re-watch the battle and decide who was in the right, but that could get very time consuming. If someone is repeatedly stealing other people's capture targets, then fine, ban them, but everyone should have more than one chance.