to prove they're not scammer project and minimize your investment of being scam...
1. look for the team if they're legit and real human... prove to yourself if they're human and real, not fake linkin from russia, reddit or facebook stuff...
2. list your find...
agreed, i always find some project that used innocent people picture to create the team project. they usually use picture from russian linkedin. they changed the name and translated the description/bio from russian to english. luckily that some people in this forum are investigate that kind of project and warn some people about it.