I think the 1614 Roman rite of exorcism was "updated" after this incident, i.e., exorcisms do still transpire, but in a different way i.e., not talking to "the demon" a la the movie "The Exorcist" but more praying for healing and so forth, reason being, if the subject is not really processed by some other entity, addressing said entity aloud directly might make the situation worse by the power of suggestion. So (to my knowledge anyway) I think exorcisms do still take place, but they try and be a bit more aware of the delicacies of those sorts of situations.
What on earth does this have to do with hacker news?