Mid or feed

So I played a match quite a while ago and this is what happened in champion select. : "Mid" : locks in : locks in : "MID MID MID MID" : "Kog is mid" : "MID OR FEED" Basically I wanted to know what to do against these players who threaten to feed if they don't get their lane. Yeah I can report them, but I still have to spend about an hour playing a game that ends up being no fun. Not only that, but we decided to give the Xin mid and he fed anyways. There needs to be a way to get rid of these kind of players. I hate when people do this, and I'm pretty sure no one wants a game to go like this. I play LoL to have fun, not to get mad at feeders, trolls, etc.