Chipped humans-electronic tagging

What are peoples views on having locator chips put inside them either with their knowledge or not. Here in the UK it has been the practice to chip your pet dog/cat etc. so they can be located if they go astray. But recently a number of parents have had their children chipped in case they are abducted (allegedly). And reading David Icke's books he seems to think that the process has already begun through vaccinations etc. Is this a good thing or not. Do we all want our every move tracked by satelite, you know, big brother is watching you, some people have tracking devices in their cars, mobile phones etc. so it is becoming the accepted norm. I'm just thinking how long will it be before we are all tagged and for what purpose.
Some people will say it will help prevent crime, the if you have nothing to hide attitude why do you object to them, but I do not think they would prevent crime or any terrorist act etc.
Crimminals out on probation are electronically tagged but it does not seem to deter some of them in commiting further crime. Can anybody see the value of having such devices inside them, would you want to be tagged?

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There are already several threads on this topic and most discuss the viewpoint you are asking about.

JDub