I went to boarding school for high school, and I had a friend who would sneak into my dorm room and sign my books. I still have my autographed Shakespeare’s plays (“Best wishes for your literary endeavors, XO Will”) and my autographed Sylvia Plath (“To my best friend Amanda, Love Sylvia”).
Every so often someone will see the Plath and their eyes will widen before I explain. Although thankfully no one has yet been fooled by the Shakespeare. So maybe your reaction wasn’t so crazy.