I agree that you can not advertise the scam project and deceive other people,but in the beginning nowhere write that this project is a scam.And many simply do not have enough experience to recognize a scam.
It is difficult to identify a scam project at first. The scam project will be discovered after the sale period ends and the developer team does not inform the progress of the project or not listing on the exchanger. Bounty hunter is only able to do research at the beginning and will not know the details of the project or team at the beginning of the campaign