I would post pictures of successful female athletes, figure competitors, and trainers who DO advocate eating protein. Post their pictures and samples of their diets.
Also, if possible, post a question posed to any of these women asking if they would be willing to drop protein because it's "highly overrated"--and "if it was so important, shouldn't more women be consuming it?"--then post their hilarious reaction, all on this dumb chick's Twitter.
Or, you could just forget about her.