Legality of blue tooth hacking

[mht3 () earthlink net]

What is the current legality of blue tooth hacking?  
At a recent Cisco security product meeting, I observed a security practice director outside snarfing phone numbers and 
addresses from the various people who were attending the meeting. He got up and presented the information saying there 
was no law preventing him from snarfing information.  I seem to recall attending a conference a while back where the 
laws regarding this type of blue tooth snarfing was discussed.

thanks for the assistance

/m

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