I don’t think that necessarily makes it a scam but it means your DYOR just take even more important role in your decision making.  Unlike everyday business, IcO’s are asking people to donate to a business model whereby investors have little or no legal cover if something goes wrong.  An ICO team being anonymous make this a tricky process but even teams not annynouns have walked away with ICO contributions in the past without grace.  
IMO ICO’s need regulation, it is too easy to tonput together a project now in the ICO format.