Nah, sounds like Steven Moffat pinched an idea from Red Dwarf. You know, the Inquisitor? Only instead of judging if people are worthy of existence by making them justify their existence to themselves, well, it must do the judgement itself.
"What have you been doing since you stole that antique TARDIS of yours, since you first landed on Skaro? Shouting 'Look at me!!! I'm not fighting a war!', while you battle the Daleks all the way through space and time."