No, unless you know how to comment that out.
That would work, and would also disable that particular popup dialog from working anywhere in mp. The dialog file in question (i believe) is DialogNotify.xml. I don't regularly use much beyond tv, music and video in mp. But from what i use, the zap2it update notification and the no signal message in full screen tv wouldn't be seen. I'm sure others could come up with better examples.Open the xml file for that popup and remove all graphic references. Set all other coordinates outside the screen limit.