Troll/Forced Dodge banning the champion you intend to play

Starts at 4:50 This came to my attention the second I saw this (worst affected would be diamond+)

Now spreading the ban across 3 other players seems fine up until we come to the fact, 80% of the time players do not want to play Jungle/Support (if they don't get their first role) and will Ban one of the champions above them in order to force a dodge or type "trolling this game" if that person has another champion. Instantly, they know this guy is going to troll if the game gets in and he's proven he will actually throw the game.

This seems a poor oversight when allowing other players to see what champion you want to play. The change for the system was clarity so you don't by mistake ban something someone wants to use, however it's a double edge sword;

Pros;

1. Clarity to avoid acidental banning of a wanted champion

Cons;

1. Hate their team comp and want to dodge, ban a teammates champion so they leave.
2. Pre-made trolling (or see above)
3. An actual troll, trolling. Going into games to force people to dodge for laughs and never actually playing.

My suggestion would be to make it so the top 2 (Mid/Top) champions on your team are Ban-proof.