completely unrelated as in if you follow the transaction graph they haven't crossed paths, so you'd need the mixer log to break the mixing.
It's difficult to know what they do with the coins, but they could be selling them on an exchange to move onto a different currency and then buy bitcoin again.
This sort of thing has been done with actual money, basically forever. It's exactly what forensic accountants are trained to untangle, in cases where far less information is available. It's not going to fool any serious player.
Nobody's bothered doing this yet on any kind of scale, but that is only because major players in the underground Bitcoin space have found other ways to get caught.
getting the information from a tightly regulated bank could be a different story to getting it from an anonymous service on Tor though. They probably don't even store it.
actually the best practice is not writing your own code and using thoroughly audited industry standards. Writing your own smart contracts for things that other people have already done and secured is akin to rolling out your own cryptography. Obviously, just like it's happened with openssl in the cryptography equivalency, this can also go wrong, but it's less likely.
If you write your own you should get your code audited by a specialist, or many, before deploying.
I'd say back-end. The front-end of any software no matter how complex it is it will always run on a single device, while a scalable back-end could imply a complex architecture composed of multiple components running across multiple servers, all working together to serve the front-end.
Alternatively, the front end can be run on hundreds of different devices and differing environments, while the back end's environment is completely and utterly locked down.
It is weird isn't it. But you can verify it by going to http://www.whatsapp.com/legal/ and reading the "Special note to international users".
My interpretation of this and a couple of other hints - you agree to transfer your info to the USA, anyone not blocked that has your phone number can read your communiques - is that they're saying that a USA TLA [or whoever] are guaranteed to be observing you when you use the service. But that could easily be misinterpretation on my part.
Who's going to offer bitcoin? Nobody living in Argentina has any to offer. American and European tourists? Why wouldn't they keep their (appreciating) bitcoins at home and just offer to pay in Dollars or Euros?
They can bootstrap a Bitcoin-variant on a new block chain, and have plenty and plenty which are calibrated to the local economy rather than the Western economy.
Remember, money doesn't have intrinsic value. There's no reason a bunch of pissed off middle class educated people can't en masse adopt a new way of trading resources.
There's a nice list of claimed nootropic supplements (legal and illegal, depending on what country you live in) and what benefits (if any) they provide: http://examine.com/supplements/Nootropic/
You can. In limiting countries you have a ridiculously low limit, and in further countries it's a bit higher. I was able to withdraw about €850 in Europe two weeks ago.