Ok ,ill stop messing about and joking now,I don't think i've ever met an astrologer that was possessed,I think if Satan existed that he would not want the workings of the human operating system to be made public, so he would prefer to discourage astrology.Also the people that i see on this planet that display the worst behaviour dont appear to do a lot of speaking in tongues, guttural speech involuntary movements or vomiting over guests.In fact they appear to do the opposite like psychopaths to keep their heads down and try not to be noticed.I feel the vast majority of this exorcism stuff is just overly dramatic people(to put it politely).
The real monsters can make big public displays as in the Stalins and Hitlers etc,But normally they are a lot less dramatic and not in the public eye.
Contrary to what i have just said I believe there are such things as poltergeists,they can make a lot of commotion in your house sometimes,but it doesnt amount to much more than childish rages that rarely harm anyone except frighten them.
And I also believe there are totally degenerate souls that have committed atrocities in previous incarnations but they are segregated according to their level of consciousness after they die and are not likely to come back to this level for quite a while until such time as they have learnt some basic etiquette.