Enter Only (Even if that’s what you’re already doing)
This one would be unremarkable, were it not for its placement — or rather, its orientation.
It’s an “Enter Only” sign, placed at the driveway/entrance to a small housing complex in South Carolina. The problem is, it’s facing outward. So only the people who are already doing the right thing — entering — can see it.
Of course, having seen it upon entry, one can of course make a mental note not to try to exit that way, later. But as far as I could see, there was no inward-facing sign warning people not to exit here.