The problem is than an inexperienced team will genuinely believe they can deliver an ambitious project and it takes someone with industry experience to see that they're biting off more than they can chew. I don't think anyone is being deliberately deceptive.

There should be some sort of due diligence process for projects that raise large amounts of money. I.E. if a project raises over 50k, they're obligated to hire a qualified and independent 3rd party to verify their project plan before any money is released.