This is educational (but also hillarious). Whole GitHub DMCA repo is fun to browse. People reporting (and get kicked) by companies large and small, from Starbucks to Tesla. You can see where some customers or ex-employees having beef with companies, whe is against open source. Universities figihting with students of 10 years ago. Massive bot attacks with fake accounts (jetbrains). And even descriptions of DMCA takedowns contain interesting info about their internal technologies.