I have always been told that a cell phone is a really short leash.
I don't believe that it is, unless you feel obligated to answer every time someone calls, as soon as they call.
I think that we make leashes for ourselves.
Things that are used irrationally that we tie ourselves to; friends, computers, Facebook, phones, family, sports, job and the list goes on. Some of these things are great and some are less than. None of them should keep us from doing the important things, friends, should not keep us from family, and sometimes the other way around. Computers, should not keep us from having a life.
I think all in all we should not be so attached to anything that we cannot do without for long enough to do what is really important now.