You don't own them.
Why can't some people understand: you don't own actors, musicians, politicians, newscasters, artists, professional athletes, etc. any more than you own someone else who performs a service for you such as an automechanic or plumber? Though I do not consider myself a literal "fanatic" I do consider myself a fan in the sense that I appreciate the work of many different kinds of artists. I tell them this when I buy a movie ticket, DVD, concert ticket, CD, painting/photo, etc. When I see them out in the world I remember that I am one of the many thousands of people that they will encounter that day and should they give each person such as myself 30 seconds to listen to "I love your work." (which they have heard over a million times by the way) then they will never have the time necessary to create that which I appreciate them for anyway. Remember 30 seconds times 120 people is a whole hour and they literally come into contact with thousands of people in a day of living their lives. Then when you factor in the safety issues. I mean you know that you mean to show appreciation however, they do not know your agenda. Remember John Lennon stopped to sign something for Chapman. Rebecca Scheaffer merely answered her door. Theresa Saldana was walking to her car. The world is mostly a safe place until it isn't. How can fans be so self obsessed to not understand that being a fan entitles you to a good performance not a person's soul?