I had to do the same at a friend's house once because he forgot his email password that was still saved in the browser!

And what about "borrowing" internet access by using a WiFi connection that used WEP? Learning the process and getting the first password was so satisfying...

In the early 2000s a lot of people rolled with no encryption at all! In high school I'd drive around the nearby neighborhoods at lunch until I found an open wifi network so I could browse the net. Never took long to find one.