It's truly not hacking or botting. As I said before, anyone that doesn't believe can try it themselves.

The correct term is "key-broadcasting", and let me just say there's nowhere in the ToS saying it's prohibited, and until it does, it's a matter of opinion. SE would have to take out that "inactive client" feature plain and simple if they want to render it useless. Still, you want to play it like a pro, then really: don't multibox. Multiboxing has no business with the real gameplay, and it's an insult and disservice to your group. Even if you make the greatest macros, you'll never replace an individual.

And as I stated throughout, endgame is not something you multibox. You can do the trivial and menial, but that's about the extent of it. Nobody is talking about doing the more difficult content, and I'm sure most multiboxers can fully chime in on this.