Tagging humans with RFID

"A new technology is to be trialled in Debrecen Airport in Hungary that will involve tagging all passengers with high-powered RFID tags.
From the Register article: 'People will be told to wear radio tags round their necks when they get to the airport. The tag would notify a computer system of their identity and whereabouts. The system would then track their activities in the airport using a network of high definition cameras.
"[The tags] have got a long range, of 10m to 20m," said Dr. Paul Brennan of University College London's antennas and radar group which developed the tags, "and the system has been designed so the tag can be located to within a meter, and it can locate thousands of tags in one area at a given time."'
The system is being touted for 'Improving airport efficiency, security and passenger flow by enhanced passenger monitoring.'
BBC is also reporting this story, and brings up such hurdles to the project as 'finding a way of ensuring the tags cannot be switched between passengers or removed without notification.'

As for any mention of the 'hurdle' of people's rights, the article vaguely and briefly states that 'The issue of infringement of civil liberties will also be key,' but doesn't bother to go into any pesky details."