back in the 90s my highschool had a computer lab and we would go there for certain assignments. I think it was history class when we went to do “research” which consisted of clicking links in an html doc from a shared drive and summarizing the articles on them. Someone changed some of the links to go to a porn site. The only thing that happened was the teacher said “whoever did this is a sick person”. I don’t know if they investigated but I was never caught.