No, there are some really good projects out there. Just do your du dilligence on the project
But it is hard to trust an ICO after some ICOs turned out to be scams, that is why in order to avoid scam ICOs, it is part of our responsibilities to do a background check for a certain project, about their team and if all of them are legit, and so on. Even I've experienced so many scams , I've never lose my hope and still continuing bounty hunting.