There's a difference between RPGers and Gaming Store Dwellers. RPGers come in all types, and are generally normal folks. Fun to play with, interesting people. Lots of people pop into game stores to buy books (or other game stores, or buy them online), but typically get what they want and go home. They don't stay to play.
Gaming Store Dwellers, on the other hand, use the Game Store as their chief form of social interaction. They're the guys that are always in the game store playing. They tend to have little to no ability to interact with the opposite sex, are overly rigid in their opinions (and thus are harder to get a group together for a specific game), and usually have serious mental baggage that has to be tap-danced around (can't deal with certain types of plots, game systems, characters not being the best, characters not being able to do everything, characters getting damaged at all, not playing Bob the Rogue version 38, etc..) They're, I think, a minority in this hobby, but have FAR more visibility and influence than their numbers would imply.