Apologies if this has already been asked. I couldn't find it in my, admittedly, cursory search.

I don't usually fly domestic much, so this weekend was my first time on a wi-fi enabled Delta flight. I was wondering if anyone else has used the on-flight wi-fi to use the Skype app on their iPhone and make voice calls. For all intents and purposes it would look like you were using your cell phone. I wonder what the reaction from the FA and other pax would be if I whipped out my phone and started talking...