Last July, amid tapas and cocktails at a Euroscience Open Forum (ESOF) conference mixer in Barcelona, I was served something far less appetizing: the news that for five days, unbeknownst to me, a radio frequency identification device (RFID) hidden in my name tag had been reporting my conference attendance habits to organizers. Ditto for the rest of the conference's nearly 5,000 participants, many of whom were science journalists.