Years ago, I validated a check from a woman named Lisa Simpson. The woman didn't know there was a cartoon character of the same name.
She obviously never Googled her name.
There are downtrodden poor neighborhoods in DC where residents don't know who Obama is. One of my old classmates did student teaching in one of those neighborhoods. She told about how some people knew nothing of White house and the Congress despite being only a few miles away.
Extreme survival mode, I guess
I'd say pretty extreme. It's not like the White House or it's location are a big secret or anything. It's been in plenty of movies, TV shows, on the news and in the newspapers. I would assume plenty of DC area DJs mention the White House once in a while.