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The main reason I'm not doing it is because they want my DNA, and I aint doing that.
I strongly believe that no-one should give their DNA, unless they want to. I don't think the police, or anyone else should have any right to demand a sample of DNA, unless, and until, someone has been found guilty of a crime.
DNA is you. It's who you are. It's probably your ultimate possession. And no-one should be forced to give that up.
I seem to have done a bit of a body swerve there, haven't I? :o)