Not at all... as stated, evil will always be there but the current way financial transactions are regulated, it makes the job of a would be extortioner or kidnapper difficult. Bitcoin opens the door to constant terrorizing of good honest people.
For example, these letters are threats, obviously. But let's pretend that they send 1000 letters, are paid 0 and then kill 5 people. Then send out another 1000. Those next 1000 people are put in a tough situation that is allowed because of bitcoin.
It's very hard to kill 5 people anonymously.
This isn't something new, criminals adapt to technology the same way we all do, that same argument could be made for email and how easy and anonymous it is to send Nigerian scam letters, and I'm pretty sure it was made.