This gets back to how poorly designed piefed is and rimus explanations.

The domain block list having more than qanon and being part of the install while not saying anything about what it actually brings in is poor design choice. Along with it apparently only being disabled by individually checking the list in the ui.

The domain warning sign mentioned in OP is a separate list only manually added to the piefed.social flagship instance

Rimu made it sound like they were connected in the qanon repo