I agree with you, but unfortunately the cruise lines have gone in the other direction by expanding the options for cell phone use - and at cheaper prices. I'm not upset by the wi-fi areas. I use them myself and there is a big difference between someone quietly using a laptop as opposed to someone telling Cousin Vinnie at home what the drink special of the day is at the pool bar.
The terrible truth is that it will only become more ubiquitous. A lack of manners and civility is more at the root of the problem than the simple use of the cell phones. People are so inconsiderate of others these days.