No one forces me, or any other writer, to sell a film option on the books. If you don't want to run the risk that the filmmakers may adapt your work in a way you don't like, then you don't sell the option. You know when you sell it that they will have to make some changes, just because film and TV are different media than books.
I was sort of traumatized by girls in the third grade. Because there was a girl in my third grade class I had a crush on. I bought her a box of Valentine's Day chocolate. And I put it in her cubby with a note that said something like, 'I am deeply in love with you, Your Secret Admirer.' And I didn't sign my name.