Must be difficult...
Alright, I would like to get it out there, there are points in time where I don't like to rage on a subject but this is completely uncalled for.
So here's the bottom line. If you're playing ranked and raging about people (namely supports or jungles taking kills - on accident no less) then please... PLEASE do not afk and say the person cost you the game. This has happened 3 games in a row for me and well I'm sorry for playing a Sona, Hecarim or even an Eve. I'm sorry you feel cheated but if we get the kill in a team game, what's the point of raging when you are ahead.
I won't name and shame but I'm fed up with people doing this and then reconnecting near the end of the game just to file a report against me for "griefing" or for "Refusing to Communicate with Team." When I am clearly not griefing, and I am most certainly communicating with everyone on the team with pings and so on. I understand people get frustrated when they are not doing well or whatever but it's entirely agonizingly brutal when you are positive in kda, your team is positive then the kill accidentally gets stolen or the creep waves get taken because someone needed it for lifesteal when someone already has 264 cs (like my last game - the person left because someone needed the cs to buy an item with someone who already had full build). Something has to be done about these players and I'm sorry that these players feel the need to rage over something so minuscule, but last time I checked these stats don't mean very much if you can't win the game. And Each loss costs everyone LP.
Moral of the story: If you lose a kill, cs or w/e and you are clearly ahead... DO NOT RAGE, AFK, LEAVE, GRIEF, TROLL etc. Ranked games are Ranked for a reason. These trolls that cost me 3 games in a row are seriously hurting my chances at ever advancing when I'm generally positive with my win/loss ratio and kda. It's entirely unfair to get penalized for someone who wants to lose on purpose. Don't do that to your teammates.