You're probably just embarassed that some you really liked and bit on turned out to be nonsense; drives a lot of the hatred of Snopes.
If you look around the site you'll find them trashing Jane Fonda, etc; they're not nearly as biased as people claim they are.
You just happen to notice the conservative or religious oriented urban legends being debunked because you're being exposed to more of them in the first place.
Nope, I was personally aware of and familiar with the UPS uniforms sold on Ebay urban legend and the resulting investigations when they occurred in Dec 02-Jan 03 months before it was an urban legend and they got around to investigating.
The first Snopes "debunking" article was wildly inaccurate and mostly quoted lies from ebay corporate.
It wasn't until after WorldNetDaily.com wrote an article on it in May 03 that they updated (July 03) to be more in line with actual facts.
They were so far off the mark on such a simple story that I realized that everything they wrote was now suspect.
Neither article discloses much, but in general I can tell you that Ebay corporate tells lies even when the truth is good news and that UPS corporate is upstanding, proactive and responsible, but they'll both deny everything ;-)