Sparks, sorry, but I agree with every one else. Within reason, cell phones should be allowed in hospitals, nursing homes, doctor's offices, etc etc etc, as long as they are not interfering with the regular business of that establishment. They provide a means of communication that would be much harder, otherwise. I would hope that anyone who leaves their phone "on" would respect the rights of others, including the professional people who are caring for them. Of course, if the doctor is standing there, needing to discuss something with a patient, any reasonable human being should get off the phone, and at least turn the ringer off, rather than saying "I'll be off in a minute". I imagine this is the exact reason that the rules are in place, if they aren't there to deter people from messing up the technology in the hospital.
I always turn mine off when I head into any office or my church, and usually just leave it in the car, instead of risking it ringing and annoying someone or ringing at a bad time.
Just my thoughts. If everyone was as careful as us, we might not need this sort of "rule" at all.