The Independent is reporting that the latest UK government sponsored quango, charged with looking at the problems of drug abuse, is to recommend a national anti-addiction 'vaccination' scheme. Apparantly, trials are already in progress. No details as to whether it would be mandatory. Personally I find such an idea utterly shocking - what happens when you find yourself injured in later life and morphine based painkillers no longer work? I wouldn't be surprised to find existing phamaceutical companies excited by this, having to replace cheap drugs with something new, which they can patent and control.
http://science.slashdot.org/science/04/07/25/1934219.shtml?tid=191
http://news.independent.co.uk/uk/crime/story.jsp?story=544439
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on the subject of this... where next?
how much rights do the governments have to alter our bodies, molecular structures, (sub)consciousness, choice
as some folks on Slashdot already said, it reminds me much of the "Clockwork Orange" scenario.
To my mind any form of control of human biology or (sub)consciousness is the greatest threat to freedom.
next they might issue a mandatory vaccination on "innappropriate" music, films, art... etc...

this being the case.. if this vaccination really becomes mandatory.. what can the population do to not go the sheep path?

Be armed. If alot of people oppose this, and they can actually tell the government to go shove it, they won't do it.