I deal, on a daily basis, with people who are using hotspots and cellphone connections as their primary connections. Netflix, Hulu, torrents, all cramming their way through some poor little Android; the laptop, the console, the iPads and iPods all feasting on its misery. I think the speeds currently being offered just shouldn't be available. I don't think "4G" is a product whose time has actually come, and telling people it exists results in them using it as if it were a real connection.
Don't ban FaceTime, just sell people the awful connection you can actually afford to sell them... The one that sucks too much to use FaceTime.