know of a scam for sure ICO is not easy. many have found out this after half-way or even the end of ICO. fishy things might be found by doing the research. see the wallet on investment is it true fit, look at the team and the concept of the ICO has also become a way to prevent a scam though not certain that certainly is.
i think you are right,
it's very difficult to detect a scam project. many investors are trapped with this and experience heavy losses even though they have researched the project correctly.
i hope there will be no more scam projects this year.