The only thing I could see in the future would be if someone were to
tap into the line somewhere under the house where there would
obviously be no markings. I'm more concerned about a house inspector
dinging me on this if I ever go to sell the house.

Geez, I wish I could have found a house inspector that good when I bought my
house!
They stick the tester in a few outlets, and if the lights look right they
are happy. At least that is my experience.