I happened to find an actor's script at a famous LA restaurant once, with all of her notes scribbled all over it. I was really surprised at how sparse the screenplay itself was, and how her marginalia really fleshed out the character and scenes.
Don't worry: I was a fan of the show (although I was meh about the actress). As soon as I finished eating, I took that script right over to the studio where her show was shot. I didn't mind being made to wait at the security booth while the guy there called over to her set; who was I, after all? Her assistant was out there in what seemed like 30 seconds to retrieve that script, and insisted on getting my contact information.
A few days later, I got a note in my mail box about an attempted delivery, which I hadn't been expecting. When I picked it up, it was a box from a certain famous agency containing a thank you letter from her for returning her script, and some awesome publicity goodies. I had to send her a thank you note for being so nice about thanking me!