Great write-up @Onions.

Isn’t this a feature though, not a bug? Many people will change their username out of simplicity or convenience. @ek may be a good example. In some scenarios, you may not want that link to be lost. You may want people to find that content.

Perhaps when you change your username you should be asked if you want to start afresh and break the link or not.

As a ~privacy advocate, I can see why people may want to retain their trust rating rather than losing it all when creating a new nym. But you have people subscribed to posts and comments, people owning territories too… are they supposed to be burnt too when you rename your profile? Surely you’d just create a new profile to be certain of breaking the link.