Many ico was here in forum and i always read the comment/reply of others, they got a negative feedback for project for participant to have doubt in campaign, I know some of member always do that so it can less the user in campaign and they will gain more profit. I wonder specific info on how to investigate, Yah, We can predict if the project will be success or not by reading the update in thread but how specific we can do to check if its scam or not.
An important amount of ICOs are scams, there is no way around it, there is a small minority of projects that are worthwhile but as other have said it is difficult to separate the issue that they are trying to sell to you an unfinished product that is probably not going to live up to the expectations.
Investing in any project is a risk we need to take to earn, but we can study it and verify its vision,if the the team were cooperative and now that almost ico provide escrows. There are lot to choose but always take extra careful.