I've seen the post on this thread, it seems difficult to know a project is a scam or not. Even for the legendary. I always follow all the projects I think I can do while praying that the project that I follow is not a scam. 
Indeed, it is not easy to judge if the project is good or is a scam. Even a project that looks good at the beginning can turn into a failure for various reasons. Investing in ICO is always very risky. That is why risk assessment is very important.