The TSA Gestapo at Las Vegas has an old TSO that should retire. She was so frustrated that she was fixated on me and I have never had this happen EVER. I have traveled all over the world and this TSO just had to keep poking at me with the full intent of getting me to react. Very unprofessional. What I noticed was that there were no supervisors on duty. ALL of the TSO's were non supervisory. The TSA needs to be totally revamped at Las Vegas and this type of unprofessional behavior should be addressed swiftly and fairly so that the other TSO's know and understand that this type of behavior is unacceptable. Period.