bitcoin is made possible by  cryptography

cryptography was created to preserve secrecy and anonymity.

when we have a full bitcoin econony , WITH NO NEED TO CONVERT FIAT TO BITCOIN, this will be a beautiful thing.

At the present time secrecy and anonymity provide fertile grounds for  hackers and scammer activities.

And the point at which bitcoin and fiat meet are a real problem for us all.

DO NOT TRADE BITCOIN FOR ANY PAYMENT FROM THAT CAN BE REVERSED.

MONEYPAK
CREDIT CARDS
BANK TRANSFER
PAYPAL
SERVE
ETC

UNLESS YOU KNOW AND TRUST YOUR TRADING PARTNER.

While you can purse scammers after fact you'll have more luck and less trouble if you vet your trading partners or use some sort of trust system (bitcointalk.org, bitcoin-otc) IN ADVANCE.

Even banks and Paypal do not pursue scammers after the fact.  THEY ARE NOT PAYING FOR THE LOSS - YOU ARE.   They set aside hundreds of millions of dollars of fees paid by merchants that allow them to write off these lossess.  The only thing banks and paypal, etc are concerned with is preventing future fraud as they do have to pay for the present fraud.  That is passed on to the consumer.