Loved the story RM--made me very happy to sit at my computer and not have to deal with people that day :D I wouldn't have had 1/2 the patience you exhibited. Really.
As for such stories making newbies feel bad? Heck no. Every time I go into the bike shop I know that I'm potential joke fodder--sometimes it is even immediate and I get to share in the joke.
Whenever we learn something new, we're going to make mistakes. Take for example, learning a new language--you will say the wrong thing and the receiver may chuckle at you. Anything new is the same way. If you don't step in knowing you'll say or do the wrong thing and provide entertainment value, you'll never learn.
What's the alternative--waiting until you've got enough book knowledge to pretend? Eeks. Where's the fun in that?
No, Tales from the LBS doesn't just entertain. They help us all but pointing out how easy it is to make a mistake, how not to be a consumer, and, well, in this case, why some days your LBS welcomes you with open arms and other days they all run to the back room when you open the door.

