I have a few thousand games on me too, I've been here since late S2, and I have never suffered any sort of punishment. And holy hell can I be a chatterbox.
What's my trick? Don't ever blame other people or attack other people. Yeah, give tips like 'mundo vs trynd is basically whichever one gets ahead first, that's why you should have picked nasus'. It's me complaining about the 0/4 mundo top who offered to go either mundo or nasus.
It doesn't attack him, it doesn't blame him, it informs him in a way that may help him in the future. He went on to prove me wrong and turned his game around rather than afk.
Or how about 'Vayne's 'weak' early game ladies and gents'. That's me at a point where in real life I have to try and not throw my mouse at the screen (maybe tower diving at lvl 2, and then just going 1v3 repeatedly after with stupid amounts of dmg).
Basically, you're a Human. You are probably far more intelligent than I am. I'm sure you know right from wrong. I mean if a psychopath can behave better than you, you need to reevaluate your life choices.