I don't believe that scams exist. Maybe is because I have never been scammed in all the ICOs I have invested in. How do you spot a scam ICO? Since I can see most threads in the Alt subforum are all about scams. Some even accuse proper ICOs that they are scams. All allegations without any evidence, surely that is what makes me believe that scams don't exist.
Good for you that you've never been into a scam project. I hate to break this to you but they do exist. For example this one :
https://bitcointalk.org/index.php?topic=2009260.0 The bounty thread and ann thread is already abandoned and there are solid evidences that this ICO is a scam. This is a sad experience for all the investors and bounty participants. ICO's like this one should not be tolerated.