Literally if four people report you get a punishment. Regardless of whether you violated terms of service. I've proven it by 4 man reporting someone who lost a lane and didn't do anything wrong but we all clicked the same report and got a notification that we'd gotten someone punished within minutes.
It just happened to me, with a 4 man premade that decided to flame me for asking for a gank.
Literally if four people report you get a punishment.
Literally untrue. Riot Tantram has openly shown the code detailing how reports trigger a review, and it shows that if four people report you, you get reviewed. If one person reports you, you get reviewed. If literally any number of people report you, you get reviewed.
This review does not automatically ensure a punishment.
Regardless of whether you violated terms of service.
If you didn't violate the ToU or break the Summoner's Code, you won't get punished.
I've proven it by 4 man reporting someone who lost a lane and didn't do anything wrong but we all clicked the same report and got a notification that we'd gotten someone punished within minutes.
An anecdote with no real content is not proof. You're saying "I know it happens because I did it once and it worked, I swear".
It just happened to me, with a 4 man premade that decided to flame me for asking for a gank.
Yeah, and I'm certain the chat logs you were provided in your reform card can show that you didn't break the rules in any way, shape, or form.
Provide the full, unedited chat logs (or match history link, if the punishment was for trolling/intentionally feeding), and we'll see whether or not the punishment was warranted.
If four people report you after you spent all game flaming them, you get a punishment.
I get reported by premades in flex all the time, nothing ever happens. Reports do nothing except trigger a review, number of reports have no additional effect. There is no reason they would, and it has been confirmed repeatedly both by riot and by testing.
So ... you got a reform card? If so post it.
If i register an account on NA, could you get me banned with your friends?
Do you want to test it?
You did it to someone who only lost lane and nothing else. And now, it happened to you. That's 
, OP.
I dont know man. I kinda doubt that. One anecdotal experience isnt necessarily proof of anything. Im no expert on the system, but I kinda doubt a game company would make a system that dumb. That sounds VERY bad for business. Ive also been in premades where we all report someone, and didnt get a notification, but who knows if they actually got punished. Ive also been mass reported, but I've never gotten punished before. So, I dont know man, there's too much evidence supporting the other way, that what you say is not true, including actual code of how it works (though of course anyone can lie) lol. Also, its hard to just take a random stranger's words as fact with no evidence provided. The main thing is how dumb of a system that would be to implement, with all of the potential profit loss due to innocent paying customers being banned for no reason. If that person you all reported got punished, maybe you just dont fully understand the rules, because he probably did break a rule if he got punished.
That's not how the system works. At all.
Occam's Razor - the answer with the least number of assumptions is the best answer.
In other words - you deserved it.
