  Decentralising the Web is a desirable but challenging goal. One particular
challenge is achieving decentralised content moderation in the face of various
adversaries (e.g. trolls). To overcome this challenge, many Decentralised Web
(DW) implementations rely on federation policies. Administrators use these
policies to create rules that ban or modify content that matches specific
rules. This, however, can have unintended consequences for many users. In this
paper, we present the first study of federation policies on the DW, their
in-the-wild usage, and their impact on users. We identify how these policies
may negatively impact "innocent" users and outline possible solutions to avoid
this problem in the future.
