I get reported in roughly 2 out of 3 games. I have not been punished in a very long time. False reports do nothing.
To give you an idea of what the average match is for me;
Dominick Destine (Janna): Don't go into here (Ping bush)
[Watches as ADC casually walks towards the bush the enemy team is camping]
Dominick Destine : (Furiously backpings the camped bush)
[ADC walks into bush and dies]
ADC: WHAT THE FUCK, STUPED N00B SUPPROT WHY NO PROTECT YOUR ADC?
Dominick Destine: Why did you do that? you gave them a free kill, I warned you with so much time in advance man...
ADC: FUK U %%% , YOU ARE WORST SUPPORT
Dominck Destine: Yeah okay, I am just going to put you on ignore.
ADC: WOW ALL REPORT JANAN STUPED N00B INTENTIONAL TROL FEDDING
(After game)
"(Paraphrasing) You have been reported for "Verbal abuse""
This happens all the time and I am not punished .... I am not punished because false reports don't do a thing, etc. If you have done nothing wrong you will never be perma-banned no matter how many times you get reported.
The trick to never getting banned is, whenever you "Feel" like insulting someone, just put them on ignore instead. Never get baited because that is how they win.