Of course. The group has a reasonable case to ownership of the project, and no one else (specifically the awol user) is contesting the handover.
[edit]: I did not even realize this would be a contentious point to make. I see lot of what-aboutisms (and downvoting): but let's take this concrete example for the story we're reading:
(1) Does anyone want to contest that the parent posters are not owners of the project (with commit access, and regarded by the project's community as it's leaders).
(2) We're not talking transferring away a govt. provided identity here. It's the github/irc project handle so it's owners can use it given the prior owner is awol.
(3) I agree there may be scenarios where this may not be as cut and dried, which is why i specifically mentioned ownership of a project, and no contention.