I've just finished reading this article about the great hamburger backlash. I have always been fairly ambivalent about it, but this one line has convinced me that I'm a supporter.
It was originally a list icon that has been press-ganged into its current role, but since a menu is simply a list of options, it’s semantically correct to use the list item in this way.
That is bang on as far as I'm concerned.
So doubters... let me have it.