You have made a very great point, and i certainly was not aware that this "idea guy" problem is this bad in game development. Maybe a different approach would

You have made a very great point, and i certainly was not aware that this "idea guy" problem is this bad in game development. Maybe a different approach would be appropriate, starting things off on "the right foot" by focusing on what they can bring to the table first, rather than the business opportunity. Resumes may get binned too, but not at the 100% rate. Focusing on the person rather than the idea also lets you focus on if you'd be a good fit for any project, rather than tossing one idea at a time their way... or if they're such a great fit you'd be willing to find a different business opportunity that suits both of you. I think if this is the common response the "clueless kids" get, there will much less clueless kids in the world. This response is infinitely more valuable than insults and rants.