This is too funny not to copy in full. From amongst Jason Kottke's observations at Pop!Tech:

The badges at Pop!Tech were wee interactive computers called nTags. When engaged in conversation with someone, you could choose to send your contact information to that person, see what that person is interested in (based on your interests), get recommendations on people that they have met that you should meet, and generally augment (or hamper) networking.

Many attendees liked them and used them happily, but others revolted. Some people started trading their badges with others. Early on during the conference, Whit Diffie hacked his nTag badge to send a sleep command to any nTag badge in range, effectively deactivating them. As word spread of the hack, people sought him out to sleep their hated badges. Others were pissed that he was turning off their badges without permission; someone asked at the end of the conference if sending a sleep command constituted an attack (When Sleep Attacks!). Following Diffie's lead, a woman hacked her badge to send the sleep command and a disgrunted Pop!Tech goer tried to rip her badge from around her neck (When Liberal Nerds Attack!).

I didn't particularly like my nTag badge (it was too heavy for one), but I can't argue that it didn't result in some interesting social behavior, though perhaps not the behavior that the nTag folks promised in facilitating networking.

In order to fulfill the fair comment requirement of such out and out text theft, I better make a fair comment. A few years ago, certain now part-holders of a conference and I over brews considered the possibility of disruptive conference theory in which false booths with morphing identity and message would be staffed by actors, all to the end of implicitly challenging the validity of the given conference and its participants. We were certain (and more so as the evening progressed) that conference organizers would pay for such services.  Sounds like a free, organic version broke out in Maine.