If you were at an AMC theater, like the one at the Grapevine Mills Mall, the last time I was there it was not a valid one. It has been a few years, but the last time I was there I noticed a small one in the corner of one of their windows printed on a couple sheets of 8.5x11 paper. I didn't even look to see if they were worded correctly because they were way too small anyway. However, their signs on the mall entrances are large enough, but the wording is incorrect. I actually was in the mall this past weekend and noticed one of the entrances was under construction or has been redone and the extra large metal incorrect sign has been replaced with a smaller, but still correct size sign that also has the incorrect wording.
I still went right on in.