This gives me an idea! I'm just going to start saying its an emergency every time I afk. The community seems to have a unified idea that it is wrong to report someone afk if they had a good reason despite the fact that there is plenty of room given that is there to account for people who had to leave for a real life reason, and the only way you will actually get punished is if you afk constantly maliciously.
I always say "If a system is exploitable, I feel I have the responsibility to exploit it". Humorously, this particular area of the leave buster system is perfectly fine. You ARE supposed report ALL afks no matter what reason they give you. If they were telling the truth and they just needed to take care of something, literally nothing will happen to them if you report them. If they are afking for other reasons a lot then the reports will add up.
Guys. Report your afks please. This concept is not that hard. Report them if they disconnected for even 2 minutes. It will do nothing if it is a seldom occurrence. If they are trying to play on a toaster hooked up to dial up every game, they should be held accountable. If they just had some isp, riot server, or personal pc bug, then the afk reports won't be in the volume required for action.