It is difficult for us to detect fraud, we can only learn to avoid and not believe in something that smells fraudulent. Be careful to always keep personal data do not get tempted something big thing.
Thats true it's difficult for us to detect fraud, before investing in one project, you should first analyze and find information the project you want to invest. At least it can help to avoid fraud.
There is a lot of scammers are hidding right now. Another bad thing that the ico review site can be paid by these scammers to give a good rate to their project. The ico review site is undirectly supporting these scammers and it can't be tolerated. To analyze which is scam ico really difficult to do.