What do they actually do with this footage? I was walking out of the ground yesterday and had a camera shoved in my face by a policeman for joining in with the "never felt more like singing the blues" song with about 500 other City fans. When I asked why he was filming me he said I was "antagonising other fans". So I got my phone out and decided to film him. I was then told that if I carried on I'd be arrested. I'm not entirely sure what I'd be arrested for but oh well.
I understand why they do it (slightly), but I'm just wondering what they do with the footage.