Not that it matters- because the photo was of a Caucasian female- so I think this person is threatening more than just our darker skinned FRiends. I would say they are trying to run a certain group off yes. Most likely a group of people they have gotten into flame wars with or with whom they disagree- or who they would like to really piss off.
So someone should start making a list of the pingees- and then we should see what we have in common- if we ever really want to figure out who did this.
It isn't that hard to do.