I don't buy it. Sorry. Common etiquette is hats off inside.
Men – Hats can be left on…
•Outdoors
•At athletic events (indoors or out)
•On public transportation
•In public buildings such as post offices, airports, and hotel or office lobbies
•On elevators
Men – Take hats off, including baseball caps …
•In someone's home
•At mealtimes, at the table
•While being introduced, indoors or out (unless it's frigid!)
•In a house of worship, unless a hat or head covering is required
•Indoors at work, especially in an office (unless required for the job)
•In public buildings such as a school, library, courthouse, or town hall
•In restaurants and coffee shops
•At a movie or any indoor performance
•When the national anthem is played
•When the flag of the United States passes by, as in a parade
http://www.emilypost.com/everyday-ma...ere-of-the-hat