That was your friend's assumption, I think, that the other poster was paraphrasing. In reality, there is no neighbourhood anywhere that is "too good" to have theft. (Heck, where do you think thieves GO to look for nicer stuff? They know nobody in their own area has anything worth stealing!)

Your friend was lazy, and he will have exactly the same experience in the spring if he doesn't figure out that the way things "should" be and the way things actually are are two very different scenarios. Sure, he can live in a world where nobody "should" steal, and he can be surprised and indignant every single time his bike gets stolen, or he can adjust to the fact that people DO steal bikes and adjust his own actions accordingly (i.e. lock the silly thing), thereby saving a lot of time, energy, and ridicule on Internet forums.

Seriously. Your friend is being willfully ignorant. That's never a useful strategy, and it wears even thinner over time. Usually individuals who persist in that approach find themselves with few friends and a mysteriously unsatisfying life, which no amount of complaining or casting of blame can improve. That or, if they do it around me too much, they get a free psychoanalysis and a wet fish to the head.