Leveling bots
Somehow, Riot, you'll have to do something about this. For a long time now, if you made a new account and started playing on it, sooner or later (probably sooner), you'd realize there's leveling bots. People are using third party software that plays for them in order to get exp without actually having to do anything. It was fine back there, because you didn't really care. Now, though, with the infinite leveling, it's a different story. I'm not sure what is going to be happening in ranked (and I really, really hope you won't be seeing such bots there), but still, for players that play normal games simply to enjoy themselves, this kind of ruins the whole thing. Maybe you need to start taking the "cheating" report much more seriously (or even add a seperate report reason - "Leveling bot" - as we'll most likely be seeing this much more as of now).