How would they know? KVM switches don’t install drivers on the connected computers. There is no way to determine that someone’s wireless mouse and keyboard are connected to multiple computers using synchronized dongles. It goes back to how multi-boxing was originally done and why it’s called multi-boxing.
I’m not sure what it is you are trying to accomplish here. Legitimate multi-boxers were collateral damage when Blizzard banned key-cloning software, they weren’t the actual target.