Katherine Albrecht has been looking into this tech for several years.
http://www.scientificamerican.com/article.cfm?id=how-rfid-tags-could-be-used
Ever since 9/11, governments wanted more advanced & reliable science behind ID tracking systems. While there are advantages, several people remain concerned about such advancements.
"Improving Security With Face Recognition Technology"
http://www.sciencedaily.com/releases/2009/11/091110090858.htm
"Computerized Face Recognition Software Can Rapidly See Through Disguises"
http://www.sciencedaily.com/releases/2009/07/090707111709.htm
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"A number for every item on the planet"
http://www.nocards.org/AutoID/overview.shtml
The tracking of people, goods & services has many advantages, but lots of people get nervous about being tracked like pets or cattle.
http://www.spychips.com/rfid_overview.html
A lot of people, especially Christians have concerns about certain numbers.
http://www.worldtocome.org/player.html#!Item=558773,1
http://www.greaterthings.com/Conspiracy/SSN_SocialSecurityNumber_666
Several people are cautious about the numbers 666 & 616. Of course because such numbers exist, they are bound to be used for a # of reasons. themultiverse.blogspot.com/2008/07/whats-up-with-all-this-666-stuff.html