All the stores have free-to-use, unlocked public bathrooms. All the product is available on the shelf for anyone to grab.
When I go on travel to more urban locations, that's not what I see. Unfortunately the urban blight is creeping closer every year, and judging by the crime reports, in a few years or decades I too will be experiencing these joys.
I have heard in especially bad-off areas desperate meth addicts are a theft issue. Usually they target people they know, so small comfort as it may be to their friends and relatives, it's usually not a random crime.