I agree. People in pre-made groups should be able to commend outsiders, especially considering that outsiders CAN give commendations to people in your pre-made group. I've already ran a few times in trios of players, so I've started to assume they're doing that also in the interest of ensuring commendations to themselves or their friends (rather than 'competing' for commendations with some stranger from another server?); of course a loud voice in my head tells me I'm just getting paranoid, but hey, the OP's suggestion would simply fix it all!