Is it bannable to threaten feed/afk?

My biggest pet peeve in this game is being spam pinged (?) for not following along with a teammate's obvious mistake. Or, y'know, you have a hair trigger moment and Flash at a bad time. Then your teammate spams your Flash cooldown in chat and proceeds to spam ping (?). Or you build something slightly off meta (eg Trinity Illaoi or Fiora), and they spam your item in chat if anything bad happens to you.

My experience is that you can make them stop by threatening to afk/feed/leave lane, at which point the other teammates will tell both of us to cut it out, stfu, and get off tilt. The thing is that I want to win, and I never have any intention of inting or losing. I have games where you probably couldn't tell the difference by the numbers, but it's just a combo of shitty play, piss poor adaptability to change, and godawful judgment.

It works like a charm and sends a message that spam-harassing could backfire. But if it's reportable, I'll stop doing it.