Surrender-Free Game Mode

It seems like in every game I play, someone wants to surrender by 10 minutes in, and then they stop trying! Most games never even finish out completely, and some of the best games are the ones where major comebacks happen, or, it goes from being 0/50 to a close game.

So, I thought it would be very beneficial to everyone if there were some kind of gamemode that banned surrendering. At least this way, players know what they're getting into before the game starts...i.e. with the mindset that they're going to finish what they started. And, for those who don't like to finish games that they're losing, the people who do will most likely be playing the surrender-free game mode instead. So I feel that it's a win-win. I think that this would make League way more fun overall. What do you guys think?