Okay, I'll play your little game of how-deliberately-obtuse-is-Paul-going-to-be-today? You said "A colleague of yours at your job...." which most reasonable people would interpret as referring to someone in the same facility. In that scenario, the colleague would absolutely have the ability to physically act on the threat sent in the email. Unless you think echinacea is stalking you and is within striking distance, the "threat" contained in his/her post is clearly a figurative expression, and constitutes NO threat to you whatsoever.......