Same-same, but different.
I was giving a SMS course in JFK a couple of years ago, attended by some fairly senior managers. One lady found it very, very hard to focus on the training and not on her sodding Blackberry. I politely asked her to put it away once, then twice. Third time I told her "last warning". Fourth time she was stabbing the screen with her index finger I went to the table she was sat, took it off her hands, removed the back cover and took the battery out, then handed the phone (sans battery) back. Told her she'd be getting the battery back, not at the end of this session (this was just after lunch), but at the end of the day.
She went ballistic, claiming the company (a company of 100K people it should be noted) would more or less cease to function if she was not permanently on her phone. Told her she could get the battery back, but then she'd have to excuse herself from the course. As the course was mandatory for managers, that wasn't really an option for her. So she went to the SVP and cried her heart out. That lasted around 30 seconds, then she was handed her pink slip and escorted off the premises.
I got an "attaboy" from the SVP; he'd been looking for an excuse to get rid of her obnoxious arse for a while.
Serves the b1tch right.