I can appreciate this silly kids' comedy because it shows what Hollywood producers and many (but not all) movie producers can be really like. Paul Giamatti even looks like that one I had a bad experience with and several scenes mirror my own personal experiences. Plagiarism is more rampant in the movie industry than we realise. Although no longer stealing entire scripts for legal reasons (it has happened to people I know), if you're a good enough writer, they will steal your ideas, characters, original jokes, lines of dialogue and even entire scenes to the point where they will render your own work stale or obsolete. Always be cautious when submitting your original work. Don't sign anything and be sure to check other writers' experiences.