Penalties for surrendering too often?

I don't even know how you'd go about doing this, but I feel that surrenders have become too common. TOO common. I can't remember the last time a victory was decided by the direct destruction of the nexus by players and minions. How many games do you think are absolute lost causes? Do you seriously think it's every last one of them where even ONE surrender vote is cast?

This mindset has to stop. It's stopping people from fighting back the very instant something starts to get the slightest bit hard for them, and it's made the game so ridiculously toxic to play I barely find the fun in this anymore. I've seen teams squander having massive leads, five dragons, a baron and two destroyed inhibitors over the enemy. I'm tired of going ADC just so someone blows up even one turret. I'm tired of bringing this up every week.

Games can be walked back. So it's slightly difficult? TOUGH! It should be challenging! The game would be a bore otherwise! Now get out there and actually complete a game for once!