If you saw a couple such as this in your town, or someplace you visited, where the woman was tethered, what would your reaction be, and should they be barred from frequenting any shop, diner etc.?

You are shopping at the mall, or dining out in another city, maybe in a lobby at a hotel you are staying in while on vacation and you see a couple like this, a guy with a leash and collar walking his girlfriend who remains two steps behind him at all times, what would your reaction be? Would you say something to either of them, complain to management, just ignore them? Do you think a couple who conducts themselves that way should be barred from frequenting any place, such as the movies, restaurants, amusement parks, etc.?