Mutter, mutter.

I'm extremely concerned by the use of lip-readers at the royal wedding allowing us to eaves-drop on what people were saying to each other when they were not aware they were under scrutiny.  It's another aspect of privacy of course.  To what extent should you be entitled to keep secret what you say or do?  A lot depends on who you are and where you are.  If you are a celebrity in a public space (as was the case here) then it appears that anything goes.  I don't like it.  I think it should be turned round and should depend on the circumstances and degree to which a reasonable person would consider that in those circumstances anything said or done should remain private.  And for me, casual under-the-breath conversation falls into that category.