What do you want to say?
Seems that you can get your message across (sans ACK) using a sort of I know that you know that I know what this is about and the takeaway from this you should have is "insert actual message here along with invitation for further engagement now or at any time in future".
Direct confrontation is unlikely to be successful - state your message/drop food for thought and wait.
"Whenever you find you are on the side of the majority, it is time to pause and reflect" --Mark Twain
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." --Albert Einstein
"This is still a dangerous world. It's a world of madmen and uncertainty and potential mental losses." --George W. Bush