Re: You're right....
> None of the downvoters care to provide a counter-argument?
I didn't push the down arrow because I don't reside in the UK and this is just one tiny part of the general fuckedness of that realm.
The reason I suspect no counter arguments were provided was they were manifold and obvious.
Take the statement "hey, I think that guy shoplifted last time" which is inarguably defamatory if incorrect which would retard even the most retarded counter jumper and would almost certainly afford more discretion to the security staff to exercise his or her judgment simply because the responsibilty is ultimately theirs.
The evil† implicit in this technology is that the security staff must act on the instruction issued by the system thereby abrogating the individual's responsibility to act with discretion and apply personal judgment to the particular circumstances.
† I use the word "evil" in its fullest sense. I am now convinced that the evil is not in the use of the technology but is implicit in the technology itself.