Cellphones are in just about everybody's hands or pockets these days, and we've gotten used to having them around.
We just notice less when people pull them out in restaurants and other public places. But that doesn't mean we're all using them properly.
In fact, cellphone users are often seen as rude by the people around them.
Daniel Post Senning writes about manners just like his famous ancestor.
We get his take on good digital device hygiene.