I agree we should pay more attention to the people we are with, which is why I don’t text in the first place.
The technology is here, and it is not intrinsically impolite. Texting is a way to exchange snippets of information without the interruption of a phone call. It allows a coach to contact all parents simultaneously about a field change or the premature rain-out of a practice session, for instance. It allows people to be available on a limited basis when they would have otherwise had to stay home near a phone.
The key is to be responsible about it. Our rule is that if you receive or send text messages, you do it under the same circumstances you would have accepted a message from a waiter that you had a phone call in the old days. If you look at your phone during a meal, you say why you’re looking at it, and if you choose to answer a text you explain why it can’t wait. It had better be a good reason, such as, “Sorry, but Junior has gotten his favorite blanket filthy and I need to text the sitter where to find his other one, so maybe he’ll quit screaming. This will only take a minute…Sorry about that. Thanks for indulging us; we’re trying to get Junior used to this new sitter, so we can get out more.” Sending this text will disrupt the meal less than leaving the table to take a call. Most dinner partners will be more than willing to indulge a break in attention so that Junior can have such an important need seen to. It would be rude, however, for Mom to have an ongoing conversation with home about things that can wait or could have been seen to before she left home.
It is like the way Miss Manners described using an answering machine to screen phone calls. She assured her gentle readers that this function used to be fulfilled by a butler or housemaid, who would inform drop-bys that "Madam is not ‘at home.’ " The caller realized they did not necessarily mean that Madam was not on the premises. It meant that she was not receiving guests.
Some people think it is rude to not answer your phone or to decide to take this call and let that one go to voicemail, but this is not so. It is rude to expect you own someone day or night just because you have their phone number. It is the same way with text messages. The most gracious way is probably a middle ground from which you accept some texts some of the time, rather all texts all of the time or no texts any of the time.
Most of all, realize that you are not Miss Manners, and you do not have the authority to deem other people rude because they do send text messages. If you don’t like to communicate that way, that is your prerogative. Don’t be self-righteous about your choice, though, implying that you are more socially advanced or caring of your fellow human being than people who use this technology. *That *would be rude, and will probably not endear you in your social circle.