Mobiles are good because they allow you to communicate with others much more freely than we typically could before. They are fashionable and as both are handy to have around in emergencies.
However, for these same reasons, mobiles are bad if you are trying to get away from it all. People still can contact you if you have a mobile on your person (and it's turned on). Mobiles can be expensive and some people can't afford them or the upkeeps and so can't always be as 'fashionable' as other people with their mobile phones (creating yet another gap in society). Mobiles are also annoying when the go off in a public area (especially libraries and such).
Mobiles are especially bad when driving. How many accidents have been coursed by those stupid retards who insist on driving, one handed down the motorway (or freeway in US cases) paying little attention to the raod as they natter on about last nights rave or party to a mate or college. Yes, there are numerous people who do it including some of you here.
Another possible bad side to mobile phones is the signals they put out. Mobiles use microwave communications. Now while these are harmless in their configured form, no one knows what prolonged exposure may do to the human body (or even effect the brain) and the number of such signals 'polluting' the airwaves has increased by almost 4000% over the last 10 years... that figure is correct, 4000% on main land europe. I dread to think what it's gotten like in North America (US & Canada).
However, do we see mobiles going out of society's window any time soon? I think not. But even if someone does prove the mobiles are dangerous for one reason or another we won't get rid of them right away, we'll probably just find another method to using them that isn't thought to be harmful. Mobiles are good for communications, but at the same time can be annoying and bad for just the same reasons at times. And there is also the possibility that the microwave radiation could be harmful in some way (the new age cigerettes, except this time around everyone is forced to 'breath in the passive smoke' of mobile phone transmissions).
People have come to accept the need for mobiles and some are far to dependant on them in the present day and age. And we won't be seeing a defenestraition* of mobiles any time soon.
* Defenestration; the art of throwing things out of a window.
