Woops, that's not good. I suppose we always suspected this would come back to bite us, but perhaps not so spectacularly.
Showing fake users on audits is non-ideal, because it creates an easy way to quickly detect audits: Does the display name look fake? Even if not, does clicking the display name bring me to a real user profile?
We just pushed a change (that will go live shortly) that will hopefully alleviate the problem:
Once the audit is passed/failed, then we'll always show the edit as having been created by the Community Userthe Community User.
But while a suggested edit audit is still reviewable, the behavior is unchanged – an unsuspecting user is randomly selected and displayed as the proposer of the edit.