The average consumer does not buy a plane ticket based on politics or emotion strictly price.

If the general (non elite, non av-geek) public could really be driven to outrage enough to boycott an airline United would have ceased operations after the Dao incident

I don't knock delta for taking a stand on this and many other issues they do, I just don't think any of the political Activism US3 is showing will sway consumers in a material way.