I would be upset if they didn't have blacked out windows. But they are obviously trying to be discreet. Nothing is being forced on anyone. Adults may enter if they only choose to do so.
As far as sex toys, obviously, you have not been to Spencers in the mall lately. And they don't have blacked out windows or an adult only policy. Personally, I would find THAT more offensive than the shop on mobile street.
I've never understood how people made the big fuss about that shop in Colbert County a few years ago and got it closed, but Spencers in the mall goes right along with business as usual....and it's a hangout for teenagers!!!
If you want to pick on something and get it banned, stop these guys who have fake testicles hanging from the rear bumpers/trailer hitches of their vehicles. Those things are about the tackiest items I've seen in a while.