Microchipped man gets virus

I saw this on Sky News yesterday.
http://news.sky.com/skynews/Home/Technology/Dr-Mark-Gasson-Scientist-Infects-Himself-With-Computer-Virus-And-Microchip/Article/201005415638978?lpos=Technology_Third_UK_News_Article_Teaser_Region__2&lid=ARTICLE_15638978_Dr_Mark_Gasson%3A_Scientist_Infects_Himself_With_Computer_Virus_And_Microchip

Apparently he was fitted with a microchip and used it instead of a swipecard to get in and out of work. He could open the doors by passing his hand over the reader. He also used it with his mobile phone. Apparently his phone would only work if he held it in his left hand (the one with the chip fitted).
The chip now has a virus and he says that the virus can spread to all the other swipe cards that are used in his building.
I find this both funny and disturbing.
One- why would anyone willingly electronically tag themselves? Some Christian friends of mine say that this is the mark of the beast that is referred to in the Book Of Revelations. Maybe, all I know is that liberty is to be cherished, not given away. Having a chip fitted would mean that someone could track your every move, wherever you are in the world, 24/7. Would you want that?
Then there's the use of these chips in lieu of a credit or cashpoint card. The information on the chip would enable you to pay for your purchases, withdraw money, travel without having to buy a ticket (the cost is debited from your account automatically).
OK, all well and good. But what if someone somewhere decided that you were persona non grata? It might be a mistake, but in the meantime your assets are frozen, you can't buy anything, travel anywhere, and your every movement is tracked via the chip in your wrist.
Not so good.
The article says that Dr Gasson infected himself. Why? Is this another of those mad scientist tales where a doctor injects himself with a deadly disease in the search for the cure?
The risk here is not confined to one person. It's possible that a virus like this could be introduced into the world at large. One terrorist with a virus loaded microchip could infect the security systems of airports and banks around the world.

There are health risks as well. many pacemakers are fitted with these microchips and if they are infected with a virus then lives are at risk.

Whoever thought that fitting people with micro-chips hadn't thought it through. I'm a basically honest person with no wish to do harm to anyone, and if I can see the evil possibilities in this, then those who wish us evil will have as well.

One commenter on the Sky article wrote this, and I agree with him-
"Biometric passports have chips inside of them, so, technically, an aggressor, someone with a grudge or some nerdy guy out to prove how clever he is, could possibly infect the UK's, or indeed any other country with a similar system, passport control system with a malignant virus and cause absolute havoc!"