A censure is a completely subjective negative judgement from one instance to another. Effectively signifying that instance A "disapproves" of instance B. The reason for this can be anything.
An instance can censure any number of instances and be censured by any number of instances
So not an exhaustive list of instances that blocked it.
freesoftwareextremist.com, at the bottom there?
Racism.
deleted by creator
From fediseer's glossary page:
So not an exhaustive list of instances that blocked it.