Rather? Part of the education needs to be not to believe random people
But then what do you do when the rov of your shul is the one pushing a scam? (As is also happening in this case) Aren't the congregants supposed to trust him?
It's simply educating people to be honest, straight, and teach them what it means to have a work ethic, don't look for the sleazy quick buck, make an honest living. People who have these solid values don't invest in this type of scam.