"As has been mentioned if you have nothing to hide whats the problem? 'They' may get more info on you...... does it matter? What is the worst 'they' going to do with you biometric details?"
I am amazed that there are so many ignorant people about, or do they have a sinister agenda? Have these people heard nothing about what happened to the jews in nazi Germany and how it was assisted by the information gathering of IBM? Do a Google search for the book "IBM and the Holocaust" by Edwin Black and similar topics.
www.news.com/2009-1082-269157.html