I asked someone to make a 2BTC image for which they thought they'd be paid immediately (even though we had no contract).
When I was a little late to respond to their inquiry, they went straight to the forum screaming that I had scammed them.
It goes without saying to expect payment for goods or provided services upon delivery, unless agreed otherwise beforehand. Is this concept foreign to you? You say that you had no contract, what's that supposed to mean? Did you expect the guy to fly over to Matthew's HQ, with his team of custom made Armani wearnig lawyers, to sign in blood 10 page contract for delivery of 2BTC worth of designing work? Do you sign a contract with grocery store owner whenever you're out to get some cheese? These dumb knobs expects to be paid immediately, how silly!
A "little late" is vague, is it a day, two, a week, by your standards?
Anyone who would sell off Bitcoin based on anything that happens on these forums much less the actions of a fallible admin should not be considered to having had 'faith' to begin with.
Bitcoin is a community project, run by people like you and me. Many people involved in Bitcoin frequent this forum, so one can judge what kind of people the community is made of, and seeing scams and wiseguys trying to pull their tricks left and right, might be off putting to some people, damaging perception of Bitcoin project and retarding adoption in this early stage. So while my statement about losing faith was a hyperbole, is not that far from the truth.