So perhaps you would be a good addition to janitors. However, we aren't looking for more janitors at this time.

What the...

IMO one should distinguish between annulling the action of firing someone, and rehiring him.

OTOH I agree that any threats uttered by that person are a reason for preventing this annullation. (ETOOMANYNEGATIVES? Well I hope my intention is still clear...) No disrespect intended to that person.