What a biased headline and article!

There are time and resources for only a limited number of entertainers to perform at any one venue - even a government facility like Walter Reed Hospital. Wouldn't it be natural to assume that the hospital staff tries to use those limited resources on entertainers that the patients would enjoy? And wouldn't it be natural to assume that someone who's identity is war-protester may not be to the liking of a majority of the soldiers at that facility?

Why use the word banned? A simpler explanation is that Joan Baez is second to last on most soldiers' wish lists of entertainers.

I am not going to perform at Walter Reed for the exact same reason that Joan Baez is not performing - because the soldiers there wouldn't like my performance. They wouldn't like mine because I'm not very good. They wouldn't like Joan Baez because she is a war protester. It's not about political statements, it is about the injured servicemen and women and what they want to hear.