Sometimes I tell people that I do that just because they started some shit and I wanna piss em off. He could've been lying. It's a way of saying mind your business. I gave first blood and everyone wants to jump on me for being a troll or whatever... Alright I'll show you a troll in chat (but never in gameplay, I just don't enjoy trolling for some reason) and tell you what you wanna hear... yes I am a troll, I fed on purpose and I've had 7 permas. Now you report, Riot sees that you jumped on me for no reason and that I played well for a silver, that I'm NOT trolling... but you get to be extra pissed off believing that I am a troll because you had to flame me for a tiny mistake.
I guess my point is, you can't just go by what people tell you in chat. Honesty is quite rare online.
EDIT: also my point is stop being so concerned with other people. Mind your business, play your game, work on your skills, stop worrying about what others are doing/not doing.