Communication!?

Why is it no one uses curse... no one talks in team champ select, confusion occurs, people accidentally or intentionally troll. I dont get it. How are you suppose to solo q "carry" yourself out, in last 2 weeks trying to climb to gold, ive gone from S1 MMR hoping to bypass S2/S1 and go straight to G5 at promos to now im at risk of going to S5. And although most of the reason was simply trolls, some of the games is just people refusing to work as a team, thinking chasing kills will win the game, or following a mobafire build and not paying attention to what enemy is building or just pathetic team comps where we get destroyed when laning phase is over. Sh!t all mediated by communication, but everyone refuses to bahhhhhhhhhhhhh.