You should carefully examine every details on the ico that they give if its correct or true or not. Most of the scam ico are impersonating some whitepapers and tend to copy some, so be careful on it. Make a proper research first before making and investment option.
Definitely I agree with you. Be careful in all aspects.even if they have visible platforms stated in the whitepaper but sometimes it is convincing because they copy it in an existing project. Sometimes also we are aiming on how much tokens they are going to give us that's why we can't research thorough every details of the ICO projects. Don't rush into investment. Study every single details on it to avoid being scam.