Well exactly my point. Any time you enter into the "lets you do stuff that you normally can't, like casting (or attempting to cast) a spell that is on a cooldown, or a spell that you should not be able to cast because your class doesn't have it, or because you don't have the required item, etc." (your words), you are in violation of the ToS. I'm sure any Mod on here can confirm this. It's still hacking.
I mean really, I'd LOVE to be able to stealth occasionally, or use an ability that another class possesses. But my class does not have that ability. Now I can (and do) arm myself with invisibility potions, but they are a part of the game. What you're talking about here are in violation of the ToS and are clear hacks.
And yea, if you've been away for a year, this is a rapidly worsening problem. I didn't see that much of it early on. I see it more and more all the time, especially among already fully donated BiS toons in big, elite PvP guilds and in arenas. That's precisely why you're seeing more and more threads concerning it. More and more of us are getting tired of playing the game within the rules, only to get ****-stomped by lesser players running scripts. I can count on one hand the number of non-scripting warriors who are ACTUALLY talented enough to go 40-0 in a short bg. The rest, when you look at the combat log or run back the video, you can see what they are doing. And it is in clear violation of the ToS. Hackers. Scripters. Cheaters.