I once managed to get creds for one of my teachers accounts which would give me the ability to see what anyone was doing at any time and kick and restrict student accounts.
Try setting up a bat file that starts at launch that will at some interval play the audio track of Shrek 2 through some form of media player(preferably one that can be opened in the tray to delay people figuring out what is happening).
Learn how to use that without being detected. So don't troll. You have power right now. Don't play cat and mouse with what has been accidently gifted to you.
I have a suspicion that the IT guy may have done it on purpose (he’s pretty based, but also like it only gives me admin rights on my computer).
I would ask him, but in the event that itnwas an accident, I woudn’t rlly want to cause an incident.
There's probably some macro utility you could run as admin which could send keystrokes. Maybe every 180 minutes have it pick from a list of human body parts and type it.