The Mouse House keeps subidizing the show as a promotional tool for the industry, so who cares if Ben likes to pose for pictures with C-list celebrities? It’s not as if “At the Movies” has been a vehicle for serious movie criticism in many years, if ever. I never met Ben’s Grandpa Leonard, who was still working for the Post when I began my career here. But on a couple of occasions I picked up his typewritten column — which appeared in more than 100 newspapers at its peak — from the doorman.