and, honestly, if your justification is helping out anthropologists 100 years from now with people’s personal data, perhaps you should consider that perhaps it’s not your problem to solve.
crimes of the past do not justify future crimes. people consider their spaces to be sacred and archival without their consent violates that sanctity. consider whether you would want you mother’s nudes archived in the same way, as that’s basically what you’re doing when you archive the fediverse.