if a scam is a whitepaper that will never happen you can assume 90% are scams or greater regardless of their intentions. The teams are unrealistic at best or outright scammers at worst. I would say eventually investors will be terrified to go near anything that is not almost complete.
Smart investors will probably do their research, we can easily detect now the scams ICO due to their background and team, even they have a good idea and objective we will for sure know it even here in the forum since scam accusations were most mentioned here if the ICO does not seems to be legit,