yes of course you know:) that something you cannot do, it doesn't means other people can't do.

And you are right, better think " If I don't know how to do -> it means NO ONE KNOWS", this is great mistake in your imagine of the world.

FBI has ask for break "SILK ROAD" bitcoin addres ,independent organisation. It was last year. And please don't inform any bitcoin users about "BTC addres" is secured.
becouse it is not.

SATOSHI has inform -> for security after one sending transactions, you can't use the same addres.  and ASK yourself why?