Well, to be honest I do tend toward the naive side...I do think others usually have good intentions. It's part of my "program" if you will, to believe we are inherently good. Real life experience has shown me otherwise, but I do still try to hold fast to that belief anyway.
As far as "selling snake oil", I cannot imagine how one would possibly benefit from trying to pull the wool over another's eyes? Or why such an endeavor would even be desirable?