I was for thirteen years a proud resident of the real-world holder of the 78666 zip, namely San Marcos, Texas, or as I put it on my correspondence? “San Marc-o-the-Beast, Texas” And, naturally in these times, there is a segment of the local populace who’ve suddenly decided to petition the USPS for a change to a more acceptable set of digits…
Welcome to the Straight Dope Message Board, d_orloff, we’re glad to have you with us.
When you start a thread, it’s helpful to other readers if you provide a link to the column or staff report under discussion. Saves search time, and keeps us all on the same page. In this case, What’s up with 666, the ‘mark of the beast’?.
No biggie, you’ll know for next time, and, as I say, glad to have you aboard. At least, I think we’re glad to have you aboard, as long as you leave your Beast at home. 
Welcome to the board, do you think the USPS will accommodate the request?
I love the “San Marc-o-the-Beast, Texas”. 
Jim
Topeka KS zip codes begin with 666. Topeka, of course, is the home of Fred “God Hates Fags” Phelps and his Westboro Baptist Church.
Going to school at SWTSU (now TSU San Marcos), I used to love that zip code. I wish I had thought of the San Marc-o-the-Beast, Texas gag. I could have had soooo much fun with it.
Mea culpa! Would “the Devil made me do it” work as an excuse?
Thanks!
Dave