How does anyone know which addresses correspond to coin mixers, and which mixers don't keep logs? There are a few we all know about, but probably some private mixers too. All it takes is one successful mix at any point in the future after the ransom has been paid.
Yes, we don't know who owns address. But we know the addressed. If some other coins went to the same address (that's how mix works, right?)Quote
Centralization = failure.
To a point only. There is a tradeoff, like with everything else. Why, for example, we have just one heart, rather than a dozen or a thousand of them? 
At least as far as p2p software is concerned, 100% decentralization seems to be working well.Quote
Right NOW there is a currency where the users unwillingly support the abduction and killing of innocent people. It pays for men with guns and predator drones to conquer whole countries and establish dictatorships. It takes from the poor and gives to the rich. Surely this bad PR would have destroyed it by now?
Do you think average Joe (We are talking mainstream adoption, right?) would agree with your diatribe? Would he rather say: "Us killing them is not murder, but self-defence. Nothing to be ashamed of. While kidnappers and their tool - bitcoin can't be tolerated. We should potect our children."