So if Riot is going to continue to wait and then ban bots in waves....
I had an idea of something that I think might help discourage the bots in the meantime. Now I am assuming the bot accounts are there to farm IP and nothing else. So Riot, if you get reports that an account is a bot, look up their match history and whatever else you have to do to confirm it, disable that accounts ability to gain IP. Then hopefully watch as a bunch of bot accounts don't show up to games anymore as they lost their reason to exist.** Then proceed to ban their accounts anyway. MWAHAHAHAHAH!!!! ** ...Ahem. But they do still deserve the ban.