I don't like the idea of bots either, but I think SE's problem is that how can they be sure that the people are actually bots? How are you even?

They have random names, no FC, probably don't respond to tells and are all together? It seems suspicious, but doesn't necessarily make them bots. I mean please don't misunderstand, you're probably right and they probably are, but unless SE know for sure, they're unlikely to just start banning accounts.

Even if they move together I'm pretty sure that's okay too (I remember reading once that multiboxing was okay as long as you were controlling all of them yourself although I can't find a link so I can't confirm that as true)

Sorry just wanted to say it might not be as simple as "Those look like bots, remove them!"

If they're glitching in/under things and/or teleporting around then SE is likely to do something if reported, but if they're just all moving around killing things, realistically how can SE be sure they aren't actually real player(s)?