All you can do is higher standards of verification on IEO platforms or launchpad's. Also, only in terms of ICO/IEO/STO/ITO I'm a supporter of more regulations and higher standards in terms of verification process before launching fundrising on any platform, community should be active and warn as many people as it is possible when any scam warnings are on the table.
Any form of fraud violations in IEO must be eliminated, the absence of rules so that many IEO have been produced just to steal investor funds. In the future, it is expected that the project team must go through verification and be willing to accept risks if they commit fraud to investors in any way.