This thread is a pile of shit.
There's very little I would actively ban in an ideal world that isnt already outlawed, prejudice being the top of the list.
Everyone who's saying they'd ban say, rap or autotune or cigarettes are far worse than rappers, drinkers or smokers. Rap isnt harming anyone, sure cigarettes are unhealthy but if you dont enjoy them, dont smoke the damn things, autotune, why the fuck would you ban that, ever listen to daft punk? They use autotune incredibly well in their songs.
I'm not saying you dont have the right to want to live in a world without certain stuff. Hell I'd like to live in a world without shop assistants, without scene queens, without snobs. But I'm not gonna ban them, because they don't deserve to have their human rights taken away from them.
Also those who say 4chan have only ever been on /b/.