Ideally, this system should look like this: the investor invests in the project and sees where the money is spent. If the project does not fulfill its obligations, the investor can return his money immediately. Thus, there will be more confidence in the ICO.
Such a system will allow investors to feel safe. Only in the near future it will be more likely an exception, because the minus is the absence of any control, the scammers will not return anything.
The rights of investors must be protacted. Now start to appear projects that try to protect investors.