We have no option other than to watch them scammed and do nothing as no body controls over ICOs, no strict rules ever come for ICOs project.  They simply launch every time and people get fool by them and they simple got away with money collected. I think there will be certainly strict prohibitions in the near future as there is very bad reputation in crypto people over new ICOs as 80% of them continue to get fail or scam at current.  At the current time, it is very hard to find a genuine ICO now days.

it may be very difficult to report to the police because in the world of crypto this is not legal in their respective countries so it is very difficult to sue the scam ico project and also the world is very hard and this might happen again and investors must be careful before investing at ICO.