Return a HTTP 301 pointing to https://facebook.com?
Might make them scan themselves instead.
Most distributed bots won't follow a 301. If 404/400 don't work, just 444 them, they're not worth giving back a response, especially on a personal website.
alt Hacker News
Most distributed bots won't follow a 301. If 404/400 don't work, just 444 them, they're not worth giving back a response, especially on a personal website.