Some ICOs are obvious scams. There is no way for you to find out if the ico is a scam or not because some of the developers are just scamming their bounty participants at the end of sale. Thats why I think we need regulation from government about ICOs. Its hard to know ICOs scam or not because sometimes they have profesional team. I think the best way to avoid from scam ICO is always reading whitepaper but its not guarantee us...