The claim is that crime increased due to out-of-area people coming to a Wal-Mart. People congregate in a Wal-Marts. The proportion of in- vs out- of-area people may differ, but there are a lot of people there. This means crime, especially because it is a store that can be shoplifted from. Much of this crime was displaced from elsewhere, because those same people weren't elsewhere.
In other words, it does not follow this crime was due to out-of-area people, since the crime would have increased regardless.
The rest of this thread (including the parent comment you were replying to) seemed to be about city vs suburbia, so that’s how I interpreted that Wal-Mart story. I’m not very familiar with the suburbanisation process in North America - I’ve never lived there - but wasn’t it driven by the desire of avoiding higher crime rates by moving to less densely populated areas? If so, local suburbanites must have hated that new Wal-Mart precisely because it was a point of congregation. Your reasoning is centered around “in vs out-of-area people” but the way I read it is just “not many people around vs lots of people around”.
The Walmart's existence as a crime nexus was because it attracted trashy people from other neighborhoods, not because it was a congregation point. The same problem didn't occur at previous superstores, or high school football games, or the community college.
The claim is that crime increased due to out-of-area people coming to a Wal-Mart. People congregate in a Wal-Marts. The proportion of in- vs out- of-area people may differ, but there are a lot of people there. This means crime, especially because it is a store that can be shoplifted from. Much of this crime was displaced from elsewhere, because those same people weren't elsewhere.
In other words, it does not follow this crime was due to out-of-area people, since the crime would have increased regardless.