Reposting from other thread, since it's about the same screenshot:

Woudn't trust too much into a customer support reply. They are known to please you as the customer to get rid of your hard questions so you don't contact again, they give simplified answers and they are not involved in the actual bans from what I understand. Those are done by different teams/developers/hacks team.

Blue posts are a better source, but even those tend to be dodgy or got things wrong in the past.

We know that only software is a bannable offense but multiboxing is still allowed. In your screenshot you (or someone else) ask about multiple mice being tied together while controlling multiple PCs and the customer rep says "no" it's not allowed. That's a bullshit reply to get rid of you, since he can't really answer that kind of question anyway.

If this were the case, anyone who share PCs/home/internet connect and play together like brother and sister or husband and wife would get banned following this logic, which is certainly not the case.

Also think about detection methods. How would warden distinguish between 2 hardware keyboard inputs be it you controlling both mice or you and your brother? Blizzard keeps firing staff and closed one of their call centers recently. Pretty sure everything is going to be automated, noone is going to follow you around for hours.

TLDR: You will never get a straight answer about this from a customer rep, because they don't know shit.