There's also those that pay too much attention when they shouldn't.
Recently I was the subject of metagaming, the scenario was that I was trapped in a glop grenade and one character ran to bust me out, chipping away at the concrete-like substance. Our remaining enemy, who was in the cargo bay's rafters, ran around and behind him to escape into the engine room - out of sight for most if not all of it. Since my character had enough movement to essentially twist her torso and head, it was feasible for me to have seen the enemy move into the room, but less feasible that I was able to report his position in the room after the door closed to our de-facto leader in this fight. At issue here is the fact that I used the Force to do so, and the person behind the character kept dogging me on it without having any feasible way to have discerned my usage of the Force. It basically came down to an opposed Deception/Discipline roll at the end of it because after arguing twice the GM decided, I succeeded and the issue was finally dropped, but I can't help feeling this type of behavior will typify my experience with that player in the future if I don't address it.
I have had a similar experience with a kid who is brand new to RPing, but knows everything about Star Wars. As an example, my character as using charm to convince he and another group member to follow my plan. My character is Falleen and using the Unofficial Species Menagerie 2.0, Falleen get a boost die bonus to such rolls because of their racial pheromones. When I made my roll, he would say things like, "Alright you stupid Falleen. Your pheromones worked on me, but I'll make you pay for that." Have had a real hard time making him understand the difference between what he is aware of us a player versus what his character would or could possibly know. Obviously the point of the opposed roll was that the loser of the roll was dominated by the winner and didn't realize that there were outside forces at play.