[justlurking]

This is a complete waste of time. Bruce Schneier calls it security theater.

As the second page of the article notes: if a bad guy sees a bag search in progress, they'll simply walk to a nearby station where there is none.

[Lurker]

This is a complete waste of time.

Not at all. At least not if you want to condition the public that random, warrentless searches in direct violation of the Bill of Rights are perfectly ok.

L