Let’s try this again.
Server A users are not posting or boosting anything that is objectionable to Server B.
But Server A is federating with servers Server B does not like. [1]
How does this affect Server B in any way? Or, why would Server B cite this as a reason to defederate from Server A?
Is it merely a case of association fallacy? (“Server A federates with Bad Servers, therefore Server A must be a Bad Server.”)
Or are there any legitimate problems Server A is causing for Server B?
[1] Usually because they find defederating to be too extreme for most situations, with too much collateral damage to innocent bystanders…so they use other means to block bad users.
EDIT: removed FediBlock hashtag