Normally woof.group announces any domain-level moderation (e.g. limiting or suspending federation) on this account using the #admin tag. We've been doing this for four years without incident. Our limited/suspended server list is also public on https://woof.group/about.
There is a theoretical (presumably small, since it hasn't happened) risk that someone notices a moderation action and decides to direct harassment towards woof.group in retribution.