Does report system works ?

Hello, recently I wanted to study this question, and for each way I think about it I found the same answer "it doesn't work". Let me explain, first I followed some players who really should get permanent ban and others just few days but RIOT did nothing, second think about it, if the system really works so we should have an EXPONENTIAL bans and these noob players will disappear quickly by the time but there is no significant light of hope, is it that hard to put an AI to manage the ban system ? I know 100% accuracy is impossible but still worth it, the rest of the difficult cases can be handled with moderators, maybe I'm missing some crucial information about that and I would like to hear your opinons.
Report as:
Offensive Spam Harassment Incorrect Board