Re: Broadcast vs. Mobile network.
I have, so far, in my whole life, been on one internet subnet which supported multicast from the Internet. And that was at an university.
IP multicast doesn't work in the real life. The best you can get is carrier local multicasting where they feed in some channels into their network. Even if this is efficiently done via broadcasting in LTE it would take up considerable amounts of bandwidth. Mobile networks, even LTE, aren't designed to handle that sort of bandwidth.
Plus there's always the expectation that you should "log" into mobile networks, which means that the carriers and therefore lots of shady institutions will have precise lists of the locations of every "radio".
Biting the hand that feeds IT
