I was thinking that same thing this morning. I've seen people on reddit find where people live just from a photo out of their front window. I've seen people track down stuffed animals that were made 20 years ago. The human hivemind and it's capabilities has to be put to a valid use occasionally.

Anyhow... What specific goals would you be trying to reach? Identify every individual who was there? Try to find photos from before the incident of people with suspicious objects?