I agree, RoaldoM. USALady is particularly bad that way. She says something contentious then, after you taken the trouble of responding, lapses into silence - only to pop up later with something new that she also doesn't respond to.
Why pray, indeed? Isn't God supposed to be omniscient? If so, he knows what's going on in your mind, so all you're doing is telling him something he knows already. Irritating for him. I'm sure.
Sorry, I forgot. Religion doesn't do logic.