[L6489afSMNLNFDa]

Except that projects are namespaced under their owner, so you'd need to hijack the owner's account. They don't appear to have been proposing deleting users (or groups), just projects.

Other than that, you can fork whatever you want today...

[trinovantes]

OP is talking about obtaining an username from an inactive user. If they were able to obtain the username, they effective took over the namespace.