I've flown with Ack Ack since he began flying, and I can't recall a single time EVER hearing him speak, to the point of pestering him about it, and offering him old mics etc. He's told me various things over the years, he doesn't have a mic, his mic is broken, he's waiting on a new one...probably just to get me to stop bothering him about it. Being in the gaming industry I'm sure Ack Ack could sort out the whole mic issue if he truly wanted to in about as long a period of time it takes to form the thought. It's simple - He just doesn't use vox, and I can't really blame him considering how some act on it.
So I call BS on the accusation of him tuning to you and insulting you. I think a retraction and apology is in order, especially since there is no film to back up the accusation.