Cool cool, now realistically, do you have the time, resources and know how to find and contact every owner of every federated instance these comments have made to? Would you be able to deal with the legal resources of any number of jurisdictions to truly test whether that is actually enforceable?

My point basically is that it’s functionally impossible regardless of what the law says, and you should treat your comments and personal information as such that they won’t ever be able to be deleted or scrubbed.