I think you are looking too deeply into this.

1. When the comparison I'm trying to draw is "huge powerful entity using its power", what exactly is the difference?

2. I don't think there needs to be a specific case - it was in the news often enough for it to be a common thing. Here is an EFF article reviewing what happened years later:

https://www.eff.org/wp/riaa-v-people-five-years-later

"Five years later, the recording industry has filed, settled, or threatened legal actions against at least 30,000 individuals. These individuals have included children, grandparents, unemployed single mothers, college professors"