Yuuup. My favorite instance in I think 9th grade was opening the computer case while the teacher was out so I could pop out the CMOS battery to disable the BIOS password, boot a live disk without the disk protection software (Deep Freeze), edit the Win95 boot logo screen[1] to put a little smiley face in the corner, and then put it all back together (sans BIOS password, since I never knew what it was originally!). No one ever mentioned it, but I'd see my little smiley every time that PC booted. Later, I spent 13 years working in reverse-engeering-related software :)
its excellent! my school only let us modify files in our user network folder, and locked down anything on the C: drive. Turns out, if you could open cmd (you weren't allowed directly, but you could ask a vba script from excel to open one) you could just rename the C: drive to the K: drive or whatever, and that wasn't blocked lol. I'd use it to hide games like https://wz2100.net/ on particular computers, and show my mates which ones were on which computers, and make little excel files that had macros to open them
[1] https://www.dslreports.com/faq/3880