Does This Really Make Sense?

Yahoo News reported this morning:

"Mayor Michael Bloomberg on Monday called off a high alert for the city's subway system after the attack date cited in a federal warning passed without incident. Homeland Security had warned New York officials of a possible threat to New York's underground mass transit system on or about October 9, based on an uncorroborated claim to Iraqi authorities.
Federal authorities had said the threat was of doubtful credibility but Bloomberg said it was serious enough to warn the public. "Since the period of the threat now seems to be passing, I think over the immediate future we'll slowly be winding down the enhanced security," Bloomberg told a news conference."

Now, I don't claim to be any expert on security, but wouldn't an announcement that says "enhanced security is winding down" give that much more incentive to terrorists to attack???

Hmmm....