Why do I get kicked out of churches for performing exorcisms on the people sitting next to me?

Now I know when a person's soul has been invaded by an unclean spirit so I take it upon myself to perform exorcisms on these people for I am simply carrying out the work of God. Just last week I went to church and a woman who was sitting next to me refused to bow her head in prayer for she kept talking on her cell phone. I immediatly grabbed a crucifix out of my pocket, pressed it against her forhead and began shouting " The power of the lord will repel you"! Not only that but I had a bottle of holy water which I took and forced her to drink. I had been escorted out of church even though I was just trying to drive the demons out of this sick woman. I mean want kind of evil person talks on their cell phone in church while everyone elso is praying?