Especially in zones where the usual rules don’t apply—like Disneyland Paris. (The entrance to the men’s room, it turned out, was around the corner, and indicated by the silhouette of a man in period dress.) This sign could easily be an Imagineer’s joke.
The contexts and cues we rely on; how seriously do we take our environments? Past experiences, culled and combined with expectations, combined to form a land where predictions, like dreams, come true.
The subtlety with which we adjust our expectations, and then adjust our behaviors accordingly. Where and when it is socially acceptable to run, or sit, or talk to strangers, or behave outside of normally accepted standards of behavior. The ways in which these spaces change over time, as a reflection or reaction to changes in society. Loiter with a cigarette or a cell phone, but rarely by yourself; the activity is the excuse.
(This is a similar danger to that of construction sites—the usual rules don’t apply. But in these cases, the rules are usually more important things, like the existence of a floor or the presence of doors into an elevator shaft. The safety built into our environments and the ways in which it may be circumvented.)