I have often said I don't know whether cell phones are a blessing or a curse. The convenience of them is undeniable. When someone needs to get in touch with me, I don't have to hang around near the land line to get the call. I can call for help if I get in a pickle (I handle horses alone on a daily basis; it could happen!) As my son begins to spread his wings, the GPS in his phone means he can get where he wants to go without confusion and distraction adding to the already considerable hazards of driving in city traffic.
But I make it clear that I own the phone, not the other way around. Everyone who knows me knows that I don't answer the phone when I'm driving. I don't actually use my phone to screen calls, though it may look like it; I won't interrupt a face-to-face conversation unless I really do think it may be important. I have never understood Twitter - never mind having the time for all those tweets, I can't imagine anyone being that interested in all the boring details of my life! Besides, if I tell everyone every thought I have all of the time, and get that sort of thing back from them electronically, what in the world will we talk about when we are actually in the same room??!
Yes! Oh that is the worst - when someone interrupts your conversation to answer a phone call! Seriously? There is such a thing as voicemail - use it.