[robotmay]

There's nothing relevant that I can see in the rules other than "be kind". These people are anti-vaxxers and therefore they are themselves unkind by definition because of their selfishness and danger they place vulnerable people in. They deserve no kindness in return when they spout their bullshit on here and whine when they get downvoted. They are anti-science and cruel.

[dang]

The rules say to be kind regardless of how kind other people are or you feel they are. We're not playing tit-for-tat here—that would guarantee a downward spiral, since everyone always feels like the other person is doing worse.

There's also the guideline against calling names, which you've done repeatedly now.