Totally believable. Every time my family has had to hire someone for rituals they'ce constantly been on the take.
GT, I agree with your comment about the wine, and consider something similar to be behind many of the Jewish laws, such as wearing kippot and not eating pork. I.e., don't do what THOSE guys do, or wear what they wear, etc.
Come to think of it, shatnez was tailor made to keep Jews away from those yummy WASP gals.