Well based on my experience i always checking their team because some of the scam ICOs has the same face of the founder make sure they are kyc verified and also check their ICO on some ICO review sites it actually helps me choosing some good ICO and also check their website fake ICO always have some ugly website that looks like some 5th grader made their website and the next thing is check their social media sites if they had many followers why not maybe they are legit somehow.