Hahah. Nice. I participated in something similar as a teen, myself. Your experience however, would likely cause my arse to be handed to me on a silver platter should I ever foolishly engage you. :)
Of course. I found him to be very amusing. I can't tell you how much I enjoyed his effort to teach me coding by altering a very simple program source I shared. He totally f***ed up the syntax with his 'improvements'; He jumped into the pool with both feet before checking to make sure it had water in it. Ouch.
While not entirely wrong on his part, we're certainly not even close to equals here. And, that's what he was implying when he brought you up. You may not have known about that, but, he didn't select you out of the blue.
Hmm. You aren't using windows 10 home then.. eh? Even with policy editor settings, I'd be leery of ensuring your changes will hold. Short of enterprise versions, they *should* hold then. I'd hate to think what could happen if they did not in those environments.
*shudder*
You marked the stick in some way though, right? So that you don't forget and install it again in something else...