How Does the Report System Even Work?

I've recently had a kha'zix jg die to red buff, and say these lines: "Im just gonna AFK farm til we lose" "Hang yourself" "As long as you lose LP" My whole team reported him and I haven't had a popup or anything. ...One time I said "gg amumu mid" and he reported me and I got chat restricted immediately. Do I gotta know someone in Riot or something? And by "immediately" I mean the game after I got informed of my chat restriction.
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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