Kiwifarms users are engaging in vigilantism against their targets, and it's not even vigilantism for a real crime - it's vigilantism for the "crime" of being transgender.
I believe the parent comment was implying vigilantism on the part of ISPs/providers for the actions they’ve taken against KF.
I agree that the participants there are engaging in something closer to vigilantism, although I don’t think they actually believe they have a righteous cause, they’re just unabashedly intolerant and enjoy harassing people which is something else.
This isn't quite accurate. While they do disproportionately make threads about people who are trans, they have plenty of threads about cis people as well. It's not like they target random transgender people. If anything, the "crime" would be being Internet-famous.
I agree that the participants there are engaging in something closer to vigilantism, although I don’t think they actually believe they have a righteous cause, they’re just unabashedly intolerant and enjoy harassing people which is something else.