Speaking as Rufferta's alt:
Some have profiles and names (one says it is a member of the Naraka Role Play Group) but they are not responding to chat. Some have no profiles. There is still one of these latter at Plage Marsouin 95/255/24.
I remember back in the early days there was a Bellisserean parcel that had an orange cloud that would not go away - I think Patch exorcised it and left a plaque in the spot. They could also be some of a group of very old avatars that were turned into zombie-bots.
My feelings are hurt that you would think I couldn't tell the difference between a regular resident and an anomaly.