Are you asking how credible Snopes is, or how credible those emails are?

I've gotten emails stating that the subject has been verified by Snopes, only to find that while Snopes has indeed researched the subject, they found the opposite of what the email claims. So, I'd have to say that those emails are subject to much doubt.

As for Snopes themselves? Well, I can't really say. They seem credible, but how would most of us know? I personally have never known any women to masturbate themselves to death on a pick-up truck gearshift, but there are lots of women I've never even met, so I can't say for certain it has never happened. I can say that on the few subjects they have listed where I do have some knowledge, so far Snopes has been right on the money.

Take it for what it's worth.

MV