My younger sister, the one who people used to mistake for my twin, was a hacker when she was little. 

She'd go on her account on the computer, type something, and later when my mom logged on to her account, she'd find that a lot of the settings were changed. 

Even though my sister had pretty much no permissions on the computer. 

Recently, I was told a very amusing story related to this. 

"How do you spell cat?" 

"c-a-t" 

"How do you spell dog?" 

"d-o-g" 

"How do you spell Nadya?" 

"You already know." 

"No I don't!" 

"What do you type when you want to get into your sister's account?" 

"Oh! N-a-d-y-a-enter!"