The Catskills comment was germane to the discussion of why Jewish stores have the policies they do.
When I was shopping with my kallah in Boro Park for a wedding ring (not all of my shidduchim ended badly B”H) , I went into a certain store. They told me a price for the ring. when I went to pay by credit card, I was told, “We’ll have to charge you more because now we have to charge you sales tax”. Halacha requires me to pay the sales tax, according to all litvishe poskim (Rabbi Belsky, Rav Dovid Feinstein, et al), do i wasn’t upset by the turn of events. So they billed my credit card. then I said I wanted it shipped. The They billed me a second time for the shipping fee. the assistant ripped up the first receipt, and then the guy started spazzing out because without my signature on the first receipt, I could challenge the payment and rob him of the cost of the ring. Then he darshened that since kiddushin isn’t valid with a stolen ring I wouldn’t challenge the receipt, and then he calmed down.
Let’s just say I did not have a good experience. That said, the fact is that many people are fond of geneivishe shtick unfortunately. Kabdeihu vechashdeihu applies to frum yidden as well- the Gemara makes this perfectly clear.
There is a famous quote attributed to various gedolim that if “lo sigzol” was a tzavaah of Rabbi Yehuda Hachassid or a chumra in the Taz instead of on the Luchos (as part of lo sachamod or as an anaf of lo signov, it would be kept more widely.