I've been noticing more and more sloppy use of images on profiles lately. It's one thing to pick an image of Unidentified Person From the Approximate Period, and quite another to slap on just any image of any person from ANY period, or an image of someone known NOT to be the person in the profile.
The most recent offenders seem to be flags - specifically, United States flags from before there was such a thing as the United States. DO. NOT. DO. THIS. Flags of the relevant state, while still anachronistic, are a better choice.
I should also like to point out that until 1801 the British flag did *not* officially include a red X on the white X - it was plain white. See Wikipedia on this subject: https://en.wikipedia.org/wiki/Union_Jack