My exah still does stuff like this even though I do not speak to him. A few months ago I sent him a short, polite, to the point email informing him of our son's wisdom tooth removal surgery and the cost (since he seems to think that I was spending the tiny amount of CS he paid on myself).
His response was a 2:30 a drunken tirade about my many character defects ending with
"oh and I am so sorry that you are so unhappy with your life"
I LOL'd when I read it.