You said correct but now a days maximum ICOs do scam that's why people have nagative aspect of ICOs. Sometimes they missed real ICOs just for their negative thinking. Any way i also say that we have to change our mind and for select any ICOs must do research their project plan and team then participate.
Negative thinking doesn't help to escalate the scams quickly, regrettably. ICOs scammed so many early investors and they came back for stealing more from time to time. Best precedent is Bitconnect that made a new announcement about coming back with strong hands. I can't fantasize how they will perform this year.