Refusing your ban is stupid.
I don't get this, I don't understand why you would ban nobody at champ select.
Do you think you're edgy? Do you think you're cool, or it makes you some kind of hard ass?
It doesn't. Its just silly. There are more OP/Cancer champions in the game than there are bans. There is NO WAY you don't have SOMEONE in the game you don't enjoy playing against. Chances are -- someone else doesn't enjoy playing against that champion either.
You have nothing to lose and everything to gain by using your ban. Its a strategic tool that you're being given to use, and you're throwing it away -- thereby not only lowering your own chance of success -- but everyone else's too!
And that's not really fair to everyone else, just because you wanted to flex your e-peen and let everyone know what a pro you are -- "Taking all challengers, I don't need no stinking ban -- look at me I'm so badass"
Cool -- then ask the team what they want banned, and ban that. Or just go look at some tier list somewhere on the internet and ban the highest win rate champion.
Ban whatever, ban a random fucking champion, whatever your mouse lands on -- just don't throw your ban away. You're not proving anything other than that you're an idiot.