Pretty tragic. They tried to get back at the Cowboys and Greg Hardy who flew a banner over their practice.
http://www.nj.com/eagles/index.ssf/2015/08/did_plane_funded_by_eagles_fans_to_fly_over_dallas.html#incart_2box_nj-homepage-featured
http://www.nj.com/eagles/index.ssf/2015/08/did_plane_funded_by_eagles_fans_to_fly_over_dallas.html#incart_2box_nj-homepage-featured