Wait, what, how is that a thing? How is it still looping? I didn't even know a message popped up when someone is loading the thing - especially not in the middle of your screen. And he certainly couldn't have done it enough as he stopped to give you attitude.
So, to be clear. He kept pressing the loader, repeatedly - which had the message show up for you that he was pressing it? And when you told him to stop he gave you attitude, for which he kept pressing it? Doesn't that action have a castbar, or does it go 'You can't do that,' for the entire group. Honestly can't remember.