When I took this new position at work (about two years ago), I was required to get a cell phone. They even took my desk phone away (which I had for eight years - people still call that phone instead of my 'new' number) since managers and above are the only people important enough to have both. I hate the idea of a leash, so I either leave it at work locked in a drawer if I am there past normal hours. If I leave early, I take it home and dump it on my dresser and forget about it until the next business day. I guess it is so folks (like my customers) can get ahold of me while I'm tooling around campus.