The latest Bluetooth-based ad campaign is worrying security types, who are concerned that it'll encourage bad phone habits; namely, that consumers wowed by the ads will keep their Bluetooth connection open to receive anything that comes their way. "This is dangerous from a user behavior point of view," said Patrick Runald, senior technical consultant at F-Secure. The new campaign, from British ad agency Filter, streams music and videos to cellphones, and Filter insists there's no way the campaign can be spoofed. We're not worried about that; we just don't want unsolicited ads kicked to us by Bluetooth. So, don't worry about bad security habits on our part; we'll be blocking this one from the get-go.