When I was in university, I scraped an internal job postings site for students to find internships. The site was terrible- each job description would load in a pop-up window controlled by Javascript, and loading a second description would override the first. It was also really slow and had limited filtering. My version could load job descriptions in new tabs, presented the table on a single page, and you could mark jobs that you weren't interested in or had already applied to.

The university didn't take kindly to that. They accused me of trying to take down the co-op system and threatened to sue me for copyright infringement. Since I linked into their system for job descriptions, I was able to show that the data I actually had (company, title, location) wasn't creative work and therefore not copyrightable. I also had some friends in the university faculty and staff who spoke up for me, since I had reported security vulnerabilities in the past, indicating that I wasn't acting with malicious intent. In the end, I just had to take a business ethics course, which I probably would have taken anyway.