I just wanted to say that i dont think banning the Niqab would have a direct impact on reducing crime. I read the post about the airport incident and was thinking that in these circumstances the authorities should be able to check to see if the person(s) who's face is concealed is not wanted etc. Again, this would probably best be done in private rooms - and i couldn't envisage any community complaining about this as long as it is enforced uniformly.
Practically however, this would mean banning/ any items of clothing that conceal and/or hinder indentification (such as caps, hoods, scarves etc) which is obviously a minefield of trickiness to enforce. But maybe this might be a good idea in places where identity is commonly checked (such as airports, stations etc) - as would be common sense?
I really dont think that a ban on the Niqab would impact general crime though - i mean why go through the effort of obtaining one and putting it on, when a cap will do just as good a job?
In relation to the whole terrorism thing, anybody could be a terrorist no matter what their religion, culture or clothing. It's to do with beleifs and in many cases grooming, and i think that is what the focus should be on.