Good old days
Waaayy back when Excite was the homepage of choice (and 286s ruled the Earth), we had one user who was typing intranet addresses into the Excite search box and getting really shirty when they couldn't be found. She also got really irate (turned red and everything) when I suggested that perhaps she would like a little bit of training on how to use a browser...
I did try to explain the difference between the Intranet and the Internet, but...