Perhaps a different approach is called for
Most people Tweet from their desks, log into Facebook during lunch, and are continually connected to both worlds so the division between the systems is flawed.
My first thought on this was that it is easy enough to reinstate the division with some properly configured firewall rules. There is less of a need to allow personal use of company resources now than 10 years ago given the widespread use of mobile tech to play online. Instead of any sort of reasonable push-back in this area, many businesses are embracing the BYOD fad. That direction will only end in tears!
(posted from work)