We see many scam ICO bounties in the forum. But there is no way to understand what is Scam, which is not Scam. Is it possible to catch anything by following it?
Always look at the team, are they trying to be anonymous. I'd understand if there is one or two who decides to be, but you should atleast know who's behind the project and research about them.
Try to find news about them being linked with the company you are about to join in.
Next is their product, do they have a product already, working, can be tested etc. or are they a start up. MOST startup companies does not have a product yet and the money they will get from the ICO will be the source to prove their concept so the whitepaper is nothing but a whitepaper. BE CAREFUL in joining those, look for real use cases, and again who is behind the project, are they know succesful folks? Hard working? do they have a portfolio of the succesful projects they've been in.
At the end of the day the cryptoverse is all about people, invest in people behind these ideas and make sure you are in it to win it.
Beware of to good to be true ICOs., companies that guarantees revenue on day 1 without any product that is just plain worthless. Be careful out there my friend.