Almost all ICO have whitepaper and roadmap. The lack of one of these dokumentovvyzyvat huge suspicion. I wouldn't begin to participate such project for investments. It is very bad omen, in my opinion. It is necessary to look for such ICO which have these documents.
similarly, I believe that without white paper is a pure fraud. in any case, it should be described what the money is collected, how much the coin is worth and how it will be used