The bible very clearly states that all souls belong to the devil until they accept Christ as their Lord and Savior. This means that all of mankind who do not know Christ are already demon possessed. They spend their entire lives running with the devil. The Pope and the catholic church make a mockery of Christianity. This is, in fact, demonic activity.
Exorcists are just the devil's playthings misleading the public to the true activities of demons.
The whole world is demon possessed. If you don't believe this, just watch your daily news, read the paper, or watch any TV talk show. The bible states that Satan is the god of this world. The day you were born, you entered into Satan's kingdom. You lived your life in rebellion against God until the day you trusted Christ.