I have worked at a couple of places where the BYOD policy was to just have those device on a guest wireless segment. It worked out fine for the most part because the actual productionnetwork was firewalled of from the guest network and had very little limitations placed on it. So people would do their daily streaming of music, videos, you name it on the production network. If something was of limits they just used the guest wireless network which was for the more part unfiltered. Since it was just considered a "guest network" no one ever really complained because it was not intended to be used as an actual production network.
I did make a few bandwidth limiting QoS changes to the egress ports of the guest network. This was to ensure that the production network did not feel any side affects of users bogging down the guest network.