Shocking. The kooks want to go down a rabbit hole here about who has authority over public street signs instead of taking their issue up with someone in the real world who could correct whatever error they believe the sign contains. That is understandable due to the absurdity of their claim. Imagine a sane person in Texas getting that call from one of these nuts. Again, though, prove me wrong and take it up with the THC, Oak Cliff, Dallas, the State of Texas, NASA, or whomever you believe has authority over the particular sign. Here's a clue to help. You can't just put up a permanent sign on a public street without approval from a municipal authority. That is not the THC but a governmental entity that must approve it. Good luck.