My picks in ranked games.

Okay so I went for a a low elo ranked game (Ahem I ain't the best) and I showed my teammates I wanted to pick Shaco, so this top laners bans my Shaco in laning phase and I'm like alright. I went ahead and commented "Negatively" asking why would he ban shaco, then went and got Yi ready for my pick as last person. Then this Top laner takes my pick AGAIN and goes to play Yi top? I'd say he went pretty far with that and good thing someone dodged, but cmon guys that's no way to be a league player yeah? it was my first ranked game of the day and I didn't really know that person. doubt I played with him before so I don't know does everyone get that sort of heated action before game?