'Deep Web' likely refers to their access to the entire Twitter stream, though it's far too buzzword-y. With that said, there can be huge value in aggregating a

'Deep Web' likely refers to their access to the entire Twitter stream, though it's far too buzzword-y. With that said, there can be huge value in aggregating and correlating all social media commentary occurring in a specific area and around a set group of subjects. The bad guys will seldom reveal their activities on Twitter or Facebook but what others nearby are saying can help track them down. Just to give an example in another sphere, social media analysis was very useful in tracking M23's mortar and rocket attacks on Goma during the recent flare-up in the Democratic Republic of the Congo, along with judging the success of the FARDC and United Nations Force Intervention Brigade counter-offensive. It will always be limited of course, in no small part because very few people enable geolocation on their tweets and social media posts will never provide a complete picture of an event. But used smartly it does have some value.