[roywiggins]

>And if a security surveillance system flags you what is the consequence? Who does that consequence apply to?

http://www.bbc.com/news/technology-35111363

> "What you can do now is link your face-recognition system to Facewatch and it will pull down the watch list that's relevant for your premises and your group," he says. "Then, if someone walks into your premises, it will send you an alert."

So if you have a criminal record, or your face somehow ends up in that database, you could find yourself followed around shops and asked (or told) to leave. These sorts of massive watch lists aren't feasible with merely human recognizers.