Surrender should be disabled in rank.
Imagine watching the LCS and you see a team surrender? Imagine watching the NFL/NBA/NHL/FIFA//MLB championship and one of the teams forfeit.
One the greatest feelings in the world isn't stomping your opponent, it's coming back from being stomped.
Just click my profile and take a look at my match history. In at least 5 of my last 20 games, my team got raped, started the game 0/7/0, lost 2 towers, down in farm. The enemy team couldn't close the game out, we slowly but surely got a few kills, towers and farm. Then won.
In 1 game you'll see we had a better team fighting composition. So with 3 inhibitors down and the enemies inhibitor turrets and T2 mid turret still up, we bunkered down in base, used our ults together, and stretched the match 25 more minutes to win it. That's 25 minutes of sitting under our nexus turret fight super minions, baron buffed minions and champions with elder dragon buff.
3 people were on board to surrender every chance they got from the 15 minute mark. Literally like 5 - 7 surrender votes with 3 people clicking yes all game.
Fortunately, a stubborn teammate and myself wanted to see the match through, victory or defeat. When you die after the 55+ minute mark, the death timer (75 seconds, maybe more) is long enough to push out the super minions and rush down mid lane. It was a race between how fast my team could push mid vs how fast the super minions in the outer lanes could siege.