When I walked into the offices of Dr. Ken Cirka, I was looking for cleaner teeth, not material for an Ars Technica story. I needed a new dentist, and Yelp says Dr. Cirka is one of the best in the Philadelphia area. The receptionist handed me a clipboard with forms to fill out. After the usual patient information form, there was a “mutual privacy agreement” that asked me to transfer ownership of any public commentary I might write in the future to Dr. Cirka. Surprised and a little outraged by this, I got into a lengthy discussion with Dr. Cirka’s office manager that ended in me refusing to sign and her showing me the door.