I don't think tattoo means former military, but that being said, there are plenty of people who were in the military that seemed to learn nothing while there.
It's hard to say why the person was carrying with the hammer down. Maybe he was frantic getting kids dressed and forgot to chamber a round. Who knows?
I wouldn't personally carry a 1911 with the hammer down. As far as intended by Browning, that doesn't really matter. Over a 100 years carrying cocked and locked and shooting sports as cocked and locked would have been found to be obviously wrong if it was.
Browning also created a single action (BHP) with a magazine disconnect after the 1911. Are we supposed to believe that all 1911s should have a magazine disconnect added?
I have to say it can be entertaining spotting those carrying. I find grocery stores to be a great place for that activity.
In my area, you'll probably lose count on a busy day.