I was browsing through some stuff and came across this website.

http://www.popsci.com/technology/article/2011-07/diy-uav-hacks-wi-fi-networks-cracks-passwords-and-poses-cell-phone-tower

http://www.youtube.com/watch?v=AdrUpmsyMZA&feature=youtu.be

Nice video

And for the fist time i am hearing the "true sound" during flight..  Rest, people replace the sound with some music.

A question comes in my mind, that doesnt the frequency of propellers create any hindrance in transmission?  .. I am talking about resonance..