Many participants in the riot stood and posed for photographs, with some even posting the photos on their own social media accounts. Photos and videos were also taken by onlookers intent on documenting the riot. In the aftermath, those photos and videos were used by many local people outraged by the riot, in an effort to tag and identify rioters and looters on Facebook, YouTube, and other social media sites, and to provide additional information to police for prosecution. Community participation in assisting police to identify the rioters has been described as unprecedented, and police admitted to being overwhelmed by the amount of evidence provided. While riot instigators were described by police as a small group of anarchists, the collected photographs and videos revealed that many participants were not connected and had never been arrested before. Online shaming campaigns resulted in some riot participants being fired from their jobs and removed from athletic teams. In some cases, violence was threatened against those identified as rioters, prompting one family to flee its home,and others to express concern about the potential of mob mentality online. The Vancouver Police Department (VPD) appealed to citizens, online and otherwise, not to engage in acts of vigilante justice.
In the aftermath of the 2011 Vancouver Stanley Cup riot, Community participation in assisting police to identify the rioters has been described as unprecedented, police admitted to being overwhelmed by the amount of evidence provided by social media.