The HBO GO app does not support AirPlay, well, you can beam audio but not video. Fine, I accept you don’t support AirPlay, lets move on. Oh wait, I can’t forget about, AirPlay is prominently displayed as one of the few on screen controls in the app.
There are only 5 controls on the screen (progress bar, rewind 30sec, play/pause, volume, and AirPlay) and one is completely useless.
I’m not sure what HBO thinks it is stopping by blocking video streaming, you have to be a paying HBO customer to use HBO GO. Lame.