Proposal: A recommended 18+ queue
Honestly, I get annoyed when I sit down to play a fun game of LoL and instead I get those 14-15 year olds who rage about everything from killstealing to nonmeta picks. I hope to play a LoL game with more mature people who don't rage about everything. I think having a 18+ recommended queue is a good idea. I mean, most adults don't even have time or energy to rage. If you have to worry about feeding your family, succeeding in work, taking care of your children, getting ready to marry, paying off a mortgage, etc, I doubt you have time or energy to rage or even care about something as trivial as a KS.
18+ won't be a limit, you don't have to actually be 18, just be as mature as one. if you are mature enough, you can join the queue at younger, but you will be expected to behave appropriately just like everyone else and not rage about dumb shit.
While there are high expectations, I feel like the ruleset itself in the 18+ queue could be a bit lighter. For example, while "gg ez" is bad sportsmanship, in the 18+ queue it shouldn't be reportable as most 18+ players would be expected to be able to emotionally handle it. I mean, in a pro football game, you don't tell the coach every insult players on the opposing team hurl at you. The coach will tell you to suck it up and be a grown up about it. However, of course, verbal harassment (actually singling someone out for bullying) will continue to be a reportable offense. But I think that in an 18+ queue, it is not the rules that govern people, but the social climate that I hope will lead to a positive atmosphere
in other words, you get freedom but you have to use it wisely