I disagree. Scammers existed before bitcoin existed and continues to exists. Merchants in US are losing aprox $190 billion a year to credit card fraud. Does that mean that anyone who uses a credit card is a fool? http://www.forbes.com/fdc/welcome_mjx.shtml...
It's not that scammers didn't exist before Bitcoin, it's that Bitcoin lends itself so darn well to scamming.
Imagine if real money was [half-ass] anonymous & mostly unregulated. Now imagine that the majority of those who used it were paranoid libertarian loons, who wouldn't think of turning to law enforcement for help because paranoid libertarians?
What do you suppose would happen? Yeah, that's right, fail & AIDS. Pretty much what's going on in Bitcoin now.