Then investors will have the confidence to invest into any of the projects.
Sorry to say this but even if an investor will be questioned like a defense or whatsoever, some investors are good at answering questions or even had a convincing power. We have so accept the fact that most of the ICOs are not that successful but there are still ICOs that are created seriously. I do think it is not easy to cleanse the crypto community by your suggestions.
It may not be so easy to completely cleanse crypto community, we can only try by coming up with all necessary ideas we fee will play its own role too, IEO has already been established to cure its own part, other systems will need to join hand too to do so.
Most ICOs that we fallen victim of scam on have solid whitepapers that you could bet that they will succeed in future and most of their whitepaper could even answer all necessary question but yet they still fail, the problem its self lies in the strength of the project developer, they need more knowledge and strategy that will work wonders as regards the project before they can come out with one, so personally sanitizing the crypto community will be difficult without these developers working on their strength.