Having an escrow only guarantee that you will be receiving the tokens. To determine whether project is scam, I guess you have to look into more aspect such as the business model and why is the team anonymous. It is better not to invest if you have doubts in the project.
at least their show their commitment to their investors that their projects will not going anywhere after receiveing money from investors.as we know now many projects lie to their investor and going run after they get money from us.