Back in 1976, my girlfriend's mother had a friend who worked for a map company and was a graduate of the University of Michigan. The company made very popular maps, everyone had one in their car.

Ohio State University, near Columbus, was the nemesis and rival of UofM. So this mapmaker stuck a couple of short texts accompanying two roads near Columbus. One said 'mgoblu' and the other 'beatosu'. They were pretty hard to find unless you knew where to look.

But his bosses found out eventually and fired him. Haha.

Agloe is a better story.