i once had a yi that just turret dived, and then told me "noc! wtf are you doing! protect me!" i never lol'ed so hard before
but tryndameres are just as bad sometimes, once, (as orianna) he goes alone about 2/3's the way into the map towards the enemy, and demands me (in the base defending, we lost inhibitor) a shield. then when he goes alone, and dies, he goes "noob team! stick together" while the 4 of us were in the base defending against a assault.
the truth is, everyone has times where they think they are hot shots, just have to suppress that and play logically. most kills doesn't mean you are mvp. if you play a carry, of course you probably will have most kills. its a team game, just be happy there are the other 4 people, probably making sure you make it to your awesome late game time