Our 96 Elephants client has succeeded in getting "Antiques Roadshow" to stop appraising ivory on new shows and delete ivory segments from old ones.  The viral video 96 Elephants made spoofing the show generated 10s of thousands of emails to PBS and got their attention when other efforts failed.  

http://www.huffingtonpost.com/2014/06/05/antiques-roadshow-ivory_n_5449917.html