This is excellent; reminds me of (very much smaller and far less cleverly executed) grief that I caused the administration at my HS back in the day[0].

There's a few comments about the risks along with a little surprise/at least applause for the administration choosing not to waste the courts/various other parts of the justice system with this prank. I completely agree -- I don't know if I'm terribly surprised they chose that route (whether or not they were truly upset in the first place). I applaud the students for executing this so carefully/well and if my kids pulled something like this off with this level of care -- well, they'd at least be getting a dinner out of their choosing -- probably a trip to a nearby theme park.

I suspect the kids involved were also certain that their approach, attention paid to keep from disrupting class and (thankfully thorough) testing that helped avoid a harmless prank turning into expensive litigation/really pissed off parents. But I'll bet there was a lot of fear around that, anyway! Had something gone awry -- and that's always where the risk is -- I'm guessing the outcome would have been more severe for these kids.

They really played the social engineering/covering their hind-quarters side of this prank very well. A large amount of effort was put toward making sure class was not interrupted[1], things worked and were tested and they provided detailed information to the administration on how to secure their systems -- that last piece allowing them to say "Without our minimally invasive prank and report you'd have never known these issues existed. We're not that special; a more malicious student could have discovered these flaws, opted for a porn broadcast and made it difficult/impossible to find them to punish." They probably understand their own school's administration and took an educated guess as to how they might handle something like that, too. At least for the scope of anything I did, I knew I wouldn't hear from the Vice Principal or Principal -- I'd solved various computer problems for them by then that the worst I'd get would be "that was cool, but please don't do that again."

I didn't get in trouble because the pranks worked similarly -- I tested/avoided disruption (most of the time), did no permanent damage and anything was resolved by a reboot (DOS and no fixed disk) and our harm was necessarily limited since there are only so many computers you can covertly pop a floppy disk in -- there was no network. The biggest factor, though, was that our programming teacher sometimes got involved, himself. He was the head of the math department, not your traditional "computer geek" and I was doing things that he wasn't teaching, so he encouraged it. The guy was amazing (passed away in the mid-00s).

So, kids, if you do try this at home, make sure it all works, provably, very very well and don't do anything that will give them other reasons to throw the book at you. And if your administration has more than the typical "Zero Tolerance[2]" stance on things, it's just a bad idea regardless.

I'm sure there were a few among the ranks that became furious but cooler heads prevailed. The report at the end was a nice touch.

[0] Mostly contained in the computer lab, which was non-networked, but when we discovered the three-letter-acronym TSR (DOS's Terminate and Stay Ready) and realized it was rare that another student would reboot an already booted machine (it took forever counting to the 512KB or so RAM installed). Incredibly, I graduated in the late 90s -- my Senior year, the lab that taught (Turbo, then Borland) Pascal was 15 years behind what most people had at home... these diskless all-in-one bastards wouldn't break.

[1] I'm sure it took the kids a little longer to get to their classes after that all happened -- that's a minor, completely expected, situation here and at least a small reward for the efforts involved.

[2] The school ten miles north of us was in a rural district and had a parking lot full of trucks with hunting rifles attached sitting in the parking lot every day (well after all of the schools installed additional locks and added security theater to make parents feel better post-Columbine)...that wasn't forbidden at least as far back as the early 00s and I wouldn't be surprised if a blind eye is mostly turned, today in some parts of that district.