Marketing By Standing Around.
The glorious Improv Everywhere have carried out some fabulous flashmob-style events over the year, but in January they surpassed themselves at Grand Central Station. In contrast to their other events, this is all about standing out by not doing something, standing out via a cohesive action and standing out by being overtly but not aggressively different. It has an impact that is deeper and, I would suggest, longer-lasting than that of the gimmicky stunt that tends to generate a laugh but no great memory.
In contrast, the version it inspired on Law and Order some months later is insipid.