How to launder Bitcoins

You are confusing ethical argument with an economical one. I was talking economics, not ethics. Governments get a lot of power from ability to print money and censor transactions. Bitcoin removes these sources of power to a high degree regardless of whether it's good or bad. Like, when the internet got huge, moral question of whether people should be exposed to "evil books" or not becomes irrelevant. If one wants to read a book you think is not appropriate, he will do so anyway.

Governments printing ASICs to spam the network... That's the most expensive way to attack Bitcoin. If anyone ever gets to it, it simply means that BTC is already established in many places and widely used and very valuable. Governments would love to extract that BTC for their spendings instead of killing it. Like it happened with gold: in theory, gold is superior to printed fiat currency, but it isn't killed, it's confiscated and used as a hard currency among those who can afford keeping it secure: governments and banks, not you and me.

Let's work this out though. What do we know about the NSA programs?

1. They collect metadata on packets originating from computers connected to pretty much all the US ISPs and many other countries' ISPs.

2. The list of Tor entry and exit nodes is public and you can bet your ass the NSA knows what this list is at all points in their logging history.

3. Most websites are based in the US, and so it's highly likely that the paths from the Tor exit nodes to these websites have some intermediate point on which traffic is logged by the NSA.

4. The NSA has access to a large training dataset of how traffic entering and leaving the Tor network looks because a whole bunch of federal authorities use Tor.

Given 1-4, I think it's likely trivial for the NSA to train a learning algorithm that will correlate packets leaving a Tor exit node with those entering an entry node.

They probably can't do this all the time because it is more expensive than just a database lookup like in the unencrypted case, but it seems me to that if they had the motivation to get you, it wouldn't be too hard for them.

That's certainly an interesting perspective but it makes certain assumptions about what bitcoin will be used for that I'm not sure I agree with.

Governments printing ASICs to spam the network... That's the most expensive way to attack Bitcoin.

Not really, somebody estimated that getting ASICs to control 51% of the network would cost only a few hundred million dollars, which isn't much at all from a governmental point of view.

Also, as far semiconductor manufacturing goes - pretty much all of it is the non-recurring engineering cost of designing the IC. The actual cost of printing it on Si is a very small fraction for large volume chips.

Governments would love to extract that BTC for their spendings instead of killing it.

Governments than can print fiat currency don't really have a problem financing their spending. They do have a problem with currencies that undermine fiat currencies.

Generate addresses offline or proxied through Tor or JonDonym. Use different addresses for every input. Use CoinControl program to send coins https://bitcointalk.org/index.php?topic=144331.0

Never post your bitcoin address anywhere you can be identified, such as a msg forum signature, or directly to an exchange for withdrawal/deposit. Use addresses not linked to you (OPSEC).

Stay away from the exchanges that want piles of ID and use P2P trading on IRC or in person.