Funny thing is: once Apple introduced the iPhone & iPad, businesses couldn’t stop people from buying their own mobile devices (at substantial personal cost, no assistance at all from business) and bringing them into the workplace for business use.
They can make personal calls but were told not to make business calls as no one knew how secure the phone was although Apple devices tend to be secure and also upgrade the IOS when a new one comes out. If they get caught on the wireless, they would rue the day they did that although they might get a slap on the wrist if they snitch off where they got the wireless pass phrase.
The greatest thing I ever saw was monitoring the firewall logs and one guy would constantly download files with the name like "she male". About five of us went up to see what he looked like. He was a director, and a freak. We left a page from the log on his desk to see if he had a clue, nope, still downloaded trans-porn, at least he didn't complain about IT or his habits would have come out.