> If you need to change history you can just create new events that accomplish your mutation -- and even mark them as a type 'change history' or some such obvio

> If you need to change history you can just create new events that accomplish your mutation -- and even mark them as a type 'change history' or some such obvious identifier so when you inspect the event stream you know exactly what you are looking at. "Right to be forgotten" isn't the same as "right to be redacted".