Some are interesting, if debatable. The article claims that while littering was not uncommon in the 1960s, "nice" people like the Drapers wouldn't have driven away from a picnic leaving their trash behind. Well, my mom wouldn't have let us do that, in the 1960s or any decade, I suspect.
And at least one is just a factual goof: Betty Draper is supposedly a sorority sister from Bryn Mawr, which the article says does not have sororities. Whoops!
I do love the show, and think January Jones is the most stunning actress on TV today. Grace Kelly II.