any film that vaguely challenges the established order

Film Audience to Terrence Malik's The Tree of Life at the Avon Theatre in Stamford, CT were having such an adverse reaction to the film that the management posted a sign outside, warning them about content:

Which I think you'll agree amazing and should be put in front of any film that vaguely challenges the established order. My experience of watching There Will Be Blood would have been immeasurably improved, probably, as I had to endured bored muttering and the sound and sight of some idiot with a clamshell mobile phone idly snapping it open and closed during the final half hour.

Indiewire have asked said cinema manager about this bold move:

"Like any arthouse theater, we have had films that were met with disdain, and there are films that had a universally negative response. Two that come to mind were “Me and You and Everyone We Know” and “Margot at the Wedding.” In general, dysfunctional suburban films tend to be received very poorly in our market. I certainly wouldn’t put “The Tree of Life” in that category; the negative response to the film isn’t for that reason. It’s more for the particular visual and stylistic approach in the film that is so different from what people are accustomed to these days."

Jim Emmerson notes some occasions when he's also resorted to these signs:

"I understand the importance of preparing people for what they're going to see. (Heck, at the Market we had a two-week first-run theatrical engagement of Peter Greenaway's "A Zed and Two Noughts," about a pair of widowered twins who become obsessed with alphabetically organizing and filming plants and animals as they decay, from Apple to Zebra. Not good for concessions sales.) As I recall, we had a (not terribly strict) half-hour refund policy: If you just couldn't stand it, you could escape in the first 30 minutes and still get your money back."