We have collected personal details of most
individuals involved in [Tachiyomi] and plan
to proceed with strong legal and institutional
responses against over 100 forked GitHub pages.¹
It sounds like Kakao Entertainment's "Global Anti-Piracy Task Force" (P.Cok) might plan on directly targetting the developers, rather than just the project itself ¹². Tachiyomi has in response removed all of their extensions except for selfhosted services ³.
I'm not too sure how much of a legal leg they have to stand on, but it isn't very surprising since Tachiyomi did have a lot of extensions for... dubious sources. It doesn't seem like they plan on adding back extensions that scrape official sources though.