It is scary and is not just Firefox. It mirrors the issues with the email blacklists I saw over 10 years ago, except it is even less clear how one runs afoul of Google. Any attempt to use my mail servers to relay spam resulted in the spam falling into the bit bucket silently. The ass who ran the biggest black list wanted the server to respond to the spammers. That takes more resources and served no reasonable purpose, yet if you didn't, you, might get blacklisted. They also did spam tests which would crash certain mail servers. They knew which ones, could detect that their test would crash the box and deliberately carried it out anyway.
It is scary and is not just Firefox. It mirrors the issues with the email blacklists I saw over 10 years ago, except it is even less clear how one runs afoul of Google. Any attempt to use my mail servers to relay spam resulted in the spam falling into the bit bucket silently. The ass who ran the biggest black list wanted the server to respond to the spammers. That takes more resources and served no reasonable purpose, yet if you didn't, you, might get blacklisted. They also did spam tests which would crash certain mail servers. They knew which ones, could detect that their test would crash the box and deliberately carried it out anyway.