Quote. People of a certain age will remember kids riding the bus in NYC with a .22 on the shoulder on their way to school. Things one sees routinely tend not to strike one as a big deal. That there is ample evidence of this principle at work doesn't mean you are wrong in all instances, but there is evidence to support it.
Just because people get used to something because they see it all the time. Doesn't mean they like it or approve of it.