That only works for other companies, not for patent trolls that are usually holding companies that own patents but don't have any products that could infringe o

That only works for other companies, not for patent trolls that are usually holding companies that own patents but don't have any products that could infringe on patents. The company that sued Cloudflare, Blackbird, is one such company: https://www.blackbird-tech.com/about/ https://www.blackbird-tech.com/about/