Why is RIOT not banning all the bots?

Everyone knows them straight away. As soon as they appear in the lobby people start calling them out for being bots. They all have the same randomised names, they always take the same sums, in game you can tell by their item purchase, the way they move is obvious, the way they randomly change lanes, they don't respond to communications. You could write a massive list of ways they're extremely obvious to spot. Every player in the game can spot them a mile off. But RIOT appears to not be able to. How is that possible? Every games it's the same bots, they're all still botting punishment free, yet I'm on 20 minute game timers from dodging lobbies full of bots. How is that fair?
Report as:
Offensive Spam Harassment Incorrect Board