So what happens if someone is blatantly "toxic" to get an account that isn't theirs banned?

Like I was in a match where my team had 2 people claiming to be boosters trying to get accounts banned cause they weren't paid or something. Obviously they were trolling and throwing racist and hate speech around like no tomorrow. But what happens to these accounts? I mean it should obviously lose standings for being boosted but I don't think it would be fair to ban the account itself, if anything, Riot should be finding and targeting the boosters' accounts. But is that what actually happens?

Seems like a really shitty situation since if you get hacked, it would basically be the same premises.