I have seen this same thing here in Las Vegas. People riding n the sidewalk or hugging the curb, sharing their lane with traffic, inconsiderate riding practices, etc.

I saw a guy the other day come out of the store and walk over to his bike. He had a really nice Trek, although I'm not sure of the model. He had all the commuter gear: rack, panniers, head/tail lights, computer, helmet, mirrors, etc. And then I watched him get on his bike and ride off.........on the sidewalk.