Haven't seen this posted; this article popped up in NNW, and I thought it was a interesting read:
http://www.guardian.co.uk/technology/2008/jun/05/news.terrorism
http://www.guardian.co.uk/technology/2008/jun/05/news.terrorism
I'm sure one of the fellow photogs on here ended up getting some kind of ID from the NUJ, after a run in with the law in Salford, though I might be wrong, there. Also something to consider.
Well, you get an NUJ card... as long as you're a member of the NUJ...