These people might as well put up an "Out of Order" sign and be done with it because, let's face it, if you do meet their incredibly specific poop criteria, you don't have time to be reading signs. You'll be lucky if you make it past the sink.
Apparently this is a Mitch Hedburg quote: 'An escalator can never break--it can only become stairs. You would never see an "Escalator Temporarily Out Of Order" sign, just "Escalator Temporarily Stairs. Sorry for the convenience. We apologize for the fact that you can still get up there."'