I found it amusing, so I figured I'd post it.
Translation: you're not getting a refund even if the film was too smart for you.
That has nothing to do with it. They're not talking down to anyone (or at least I hope not), but just stressing that if you don't know what the movie is, you can't come out of it and claim you were duped.
I've heard/read 100s of comments from people about the film and the ignorance always annoys the shit out of me. Why would you go into a film having no idea what it is? Some people are so simple.
There's something to be said about going in blind to a film and just experiencing it with no idea what it's about, but not every film is good for that, as we've seen.