Does anyone else not see the point behind banning champions?
If champions are too OP to be fair to play against, that's up to Riot to fix. Allowing people to "ban" these champions is a design flaw. It's like saying "just in case we can't do our job, here's an extremely arbitrary safety net."
Besides, can you honestly say you're good at this game, and can you honestly say you're a high-skill player, if you reach Diamond without knowing how to play against Blitzcrank because you ban him every time? Can you really say you're good at the game?
This isn't the only reason why I only play normals, but it is one of them.