Forfeiting needs to be frowned upon.
Forfeiting, even though it is a function the game allows, needs to be frowned upon. This comes especially since the release of champion rank 6 and 7. These ranks require you to get S- two times, and S or S+ 3 times. If you complete a game in 25 minutes with 5 kills, 0 deaths, and 30 assists, with a nexus destruction, you're guaranteed an S or higher. If the other team forfeits before you get to destroy the nexus, you get an A+, or S- (not good enough for rank 7).
On average, if you play 10 games, 8 or 9 of them will end in a forfeit, making getting to rank 7 actually just a luck based thing, wether or not they decide to quit. Some people will say "maybe beat them slower" but that's just dumb, and not really something you want to do when trying for an S.
Something needs to be done to show this system isn't just a huge joke. Either remove the forfeit negative effect on your winning rank, or show people that forfeiting is not something we accept by removing all ip gained from the team that forfeit. Maybe even increase the ip gain for teams that lose, but don't forfeit.
TL;DR Forfeiting had a negative impact on the winning team's champion rank and something needs to be done to reduce the occurrence of forfeiting. 8/10 games being forfeit is unacceptable.
EDIT: Instead of hitting the down rate button and saying nothing, how about some of you guys voice your opinion? Down rating with silence shows your lack of ability to make a real thought.