Bronx officials try to rein social media 'takeovers' after events turn chaotic

they were called flashmobs, and were innocuous.

its the call for collective action disruptive nature thats problematic.

its the response as well.

what is described as a riot, screwing up a malls business day, is not normal.

however, just how rowdy does a snowball "fight" in a park become to justify police response.

social media amplifies and extends these gatherings, the potential for enormous gatherings exists.