I was going to say something about how it shouldn’t apply to timed-out idlers, but then I realized they don’t ask to be idle, so it doesn’t. Success!

Sounds familiar:

http://blognomic.com/archive/concept_patch_re_idling_and_unidling/

  In my recent case, I genuinely thought I would be gone longer than I was; I unidled to vote on a proposal. Similarly, in Rod’s meta, Clucky was going to idle but unidled to prevent a scam.

That someone could use the existing unidling mechanic to prevent a scam (and only in the rare case where they intend to go idle, are actually still around, and are somehow the only person who can prevent something) doesn’t seem worth letting another player use the same mechanic to achieve a scam.

@Kevan: I would vote FOR if there was a shorter limit; perhaps only 24 hours.

(And, of course, true scammers don’t mind waiting 4 days, so this just keeps all the amateurs out :P)

Note: An admin might still scam by tactically idling, since if they idle themselves they didn’t technically request to be idled.