Yeah, I hear ya... there is a bar near where I live that has quite a few species including nurse sharks in aquariums they can barely turn around in... I guess that is their "draw" to get people in the door. (not sure of the rules of this forum, so i'll refrain from mentioning the name of the place)...
I'll agree that most people who keep sharks shouldn't, but there are some people (jcrim is a good example) who are willing to provide the necessary space, knowledge, and husbandry practices to keep them alive and happy long term.