On the other topic of personal data: the critical data like real name, home address, phone number, email address, former employers etc. should absolutely not be federated, thats a need to know basis.
Wait till you hear about yellow pages and white pages!
Let’s say you have political beliefs and would like to donate to such causes, March against genocide, stand with local essential workers, union fee. Some places like Hungary might be very dangerous if everyone knows what you spend money on.
Wait till you hear about yellow pages and white pages!