BYO used to be bad. REALLY bad. People brought their own devices to work. Terrible of course. At lease according to the IT Dept. All these different devices. With different interfaces, sale security solutions, access routes.
Add a year. Comes IT Dept loves BYO. Why? Suddenly it appears that our staff is not accessing sources of lots of strange code on their working machines anymore. The rest is technology.
Summary: Embrace BYOD!