While im usualy pretty open minded to technological advancements, this is one that i feel strongly about. I dont think RDF tags belong on anybody.
My main reasoning behind it is this: PEOPLE ARE LAZY.
With every technological advancement thats made, people begin to depend upon it more and more. Some are usefull, some are probably harmfull, but regardless, socity dictates that we all need to utilize these things, in order to increase peoples free time and health. This is no different.
The tagging would start out small, and then increase with every news report of a lost child found. Investors would then begin investing heavliy in these products. With the heavy investments, corporations would then begin lobbying the states (or local goverments) to endors the products. Once the states begin endorsing them, the school boards will follow. Eventualy the insurance companies will start requiring them also.
People will at this point, start considering these not options, but essential.
Once its considered essential, the lawsuits will begin over who is responsible for the tagged children. Parents, states, and schools will sue the manufactuers and the companies who monitor the children anytime a child isnt found. Everytime a kid is diganosed with cancer, someobody will try prove it was chip that caused it and sue. Divorced parents will sue each other over things like who is responsible for paying for the chip or if the child in fact has to be tagged.
It would be a huge mess, and it would be done in the name of saftey although such a product does not actuly make anything safer. Sure the parents can sleep easier at night... while Uncle Chester the Molester sneaks into a childs room. Or perhaps they can enjoy their tropical cruise more if they know the child is safe at church camp being molested by a clergy member. Maybe the alcoholic parents will enjoy their beer down at the bar better knowing that if their 14 year old daughter should not return home tonight, they can find her tomorrow (albeit now pregnant, 3 states away, and with her 32 year old boyfriend she met online).
The truth is that the majority of all kidnappings and molestations involve somebody that the child knows, and in or around places that are considered safe (churches, schools, and homes). This tag will not prevent those.