I'm a jungler man, I get reported(pop up and everything) after games where I've literally not typed a word. Every Lee Sin game where I'm not 5-1 at 10 minutes I'm fully expecting the vitriol to start. I abandon lanes that get dumpstered early and that's always a recipe for a report. You either tell them calmly " you are too far behind, just do the best you can while I help the other lanes" or you ignore it, neither of which tends to go over well with the person getting shat on. Heaven help you if you suggest the mobis/talisman rush blitz getting camped by Udyr should probably buy a sightstone. I had a dude lock jungle 5th pick after I was already jungling last week, do nothing but farm jungle camps(contesting ones I was on), ignore the empty top lane entirely, then when I suggest in all chat he needs to be reported he makes up a story, I call him out on it, and I end up with a report too. There is just no recourse for your average player when dealing with the shitheads. Better to just pretend the chat window doesn't exist and communicate via pings/morse code.