See some photos of storefronts here (some are totally legit like B&H, but you see some of the photos and names and you get the picture)
That being said, don't buy a suspiciously cheap camera from a store that's closed on Saturday unless you've done your due diligence. And even then you're taking a risk.
In general I have no evidence that Hasidic jews are any less ethical than any other group of people. At the same time there appears to be an ongoing problem of the ones in Brooklyn using their appearance of religiosity as a cover for committing crimes, especially related to selling stolen electronics and drug dealing. (Jesse Eisenberg was recently in a movie called Holy Rollers, which was about the latter problem.) Sure there are some people who are losing business due to being falsely stereotyped, but it's like 200 people as opposed to 200 million so the social consequences are fairly limited.
A more thorough investigation would have saved me the trouble. If you've never heard of a company, a significantly lower price from a high cost location is a definite warning sign.