Nah, if it were then ebay, paypal, most online stores, etc. would have gone defunct a decade ago. This is just one of the major growing pains of a new and popular service, that the community needs to take time to work out. When EBay first started out it was scam central, kind of a wild frontier, and over time it got refined in such a way that it's (perhaps excessively) safe. There will always be people looking to get something for nothing, fleecing sheep, just one of the sad little lessons of life, but I think most people understand this, and as they become more familiar with a service and safeguards are made easier and more readily available it will be less and less of a detriment to the service as a whole.

In relation to OP, there is a quote I enjoy:

"You cannot cheat an Honest man."

Sadly I'm not an honest man, but it's a good concept to keep in mind.