I agree, but who police it unless its done under the petshop licence and when they check out how they look after the animals check the items they sell are suitable and if not they lose their licence, di
I've also see quite a few of those very narrow tanks that are almost like picture frames on e-bay. I can't see that they can make very good homes either. With such a small surface area, oxygen levels must be very low.
A lot of people just see fish as ornaments, rather than living creatures.