Diploma in Advanced Reply-All Studies

Confer on your coworker a framed diploma in Advanced Reply-All Studies. Save it for the one whose reply-all habit you'd defend to anyone outside the thread. Produce it to full ceremonial standard — engraved lettering, a foil seal, a ribbon, and more mat than the frame strictly needs. The conferral text reads:

The Council on Reply-All Misconduct, Division of Continuing Studies, by virtue of the authority vested in it and upon the recommendation of the Faculty, hereby confers the degree of Diploma in Advanced Reply-All Studies, with all rights, honors, and responsibilities thereunto appertaining, the candidate having demonstrated sustained excellence in the field, as witnessed by all.

Keep a transcript ready in case they ask. The coursework: REPLY 201, Replying to All to Say Thanks; REPLY 305, Looping In: the Addition of Personnel as a Form of Escalation; and SEM 410, Removing Oneself From a Thread, which they audited and did not complete. The thesis went to a committee of three hundred forty-one members, none of whom requested it, several of whom replied to all to say they thought they'd been included in error.

The degree grants no privileges they weren't already exercising. Hang it at eye level, next to the monitor, at a brief ceremony they didn't agree to attend. They'll act put out, and leave it up.