I'm skeptical she'd take this kind of action, but maybe Adria is more naive than I thought. First she is shocked at the reaction of her public ostracization, then she thinks suing an ex employer is within her best long-term interests? Even if she wins (not likely, contrary to the legal opinion submitted here last week) and gets a few hundred thousand dollars she'll be even more blackballed by the rest of the industry than she already is.
Her ONLY safe play, long-term, was to apologize for how she handled the issue (which was not exclusive to pointing out the inappropriate commentary!) and make a lateral career shift of some sort.