Yes it is necessary to research thoroughly the white paper and the team behind the project , I have seen a project team with picture , it quiet impressive and it shows the legitimacy of the projet , and I think it can attract investors .
some scams use photos taken from other project teams. some project that caught the scam also based on team photos and background profiles of the team project. then it is important to examine more thoroughly the team of the project. the issue of the composition of the team make investors come be a part of marketing.