Don't get me wrong. I'm not against collaborating with people on spec projects for which they show a deep passion and commitment to seeing made into scripts. I've done it on a few occasions and the end results show some serious promise.
However, I am vehemently against is working with individuals who have “million-dollar ideas”, who promise to “split everything fifty-fifty” and who lack an understanding as to how professional writers work.
Let that phrase sink in: professional writer. While I create scripts because I love the process and I enjoy helping those who need it, I also want to make a living at doing what I love.
Here are some of the reasons why people with "million-dollar ideas" need to invest a few dollars in hiring a professional screenwriting consultant.