Why blur? Because the world is full of lunatics who are very clever at getting information surreptitiously. I know someone who received a death threat from a person in another state who didn’t like a humorous letter published in a national magazine.
I’ve also been contacted by someone who found me through my license plate, because a helpful county worker gave him my address. Legal or not, some people who are charged with protecting your information give it away just to be “helpful.”