I'd like to suggest you alter your punishment system. I tried to do research on how a "punishment" can vary, but from what I have read a punishment is a ban that exists for different lengths of time depending on the offense of the person who is punished.
However, I believe that this system is currently lacking in how it judges players in the competitive scene. I would like to request that the tribunal adopt a policy such that a player who is reported in a ranked game be tried in the tribunal as a ranked player. If that player is found to be in need of a punishment he should be disqualified from all ranked games for a period of time, but not from normal games.
The reason I suggest this is due to the fact that people play normal games and ranked games for different reasons, and will act in different manners according to the game type:
A general ranked player is trying to win the game as best that he can and takes it somewhat seriously.
A general normal player is more interested in having fun and having a good game, but doesn't necessarily want to win. Some people just use normal games to practice. (I get people who practice in ranked games... #notcool)
My point here is that there are too many people on the LoL ranked ladder who don't treat it as it should be treated. It's a ranked game, it's a somewhat serious game for some people. Having people who just don't know what they are doing or who intentionally feed because they are out played is not fair to the majority of the true ranked community that wants to have a good and challenging game.
In DOTA, if a player isn't treating the game seriously, he's out. Banned. Gone. Bang. Done. No questions asked. On League of Legends, we have to report people over and over again just to maybe get that one person to obey...
System needs to be not only harder on players, but more focused on the ranked community.