IMHO, this behavior is directly linked to the selfie generation. It is a narcissistic behavior pattern that puts one's feelings above those of all others. It's the whole "I'll do what I want, you just mind your own business" mentality.
It applies to
- talking when others are trying to listen to a target performance.
- cutting in line
- Phones in theaters or in any scenario that degrades an experience for others
- and a new ones that is becoming more common, talking on speakerphone in public. wth
- cussing in public, especially around children
- profane clothing
- dressing however you want (white dresses at weddings comes immediately to mind)
- about 100 different traffic shenanigans, including almost all lifted truck drivers.
- littering
- being late
- unnecessarily rude to staff
- tinkling in non-tinkle zones in public restrooms
- ...insert a ton more items here...
All of the above behaviors are almost intentionally done to annoy others. The good news I suppose, is that in most cases, it is just complete ignorance of impact beyond oneself.
All of the above feels new to me. Like, in the last 20 years a 400% increase. ...but I may just be getting sensitive to decades of exposure.