I also get the feeling players have this idea that because they weren't TOLD it was a glitch, and therefor just kind of... discovered it happened... that it's not their fault.
"Oh... wait, I got 5000g AND still kept my piano? ... weird, let me try that again!" and it happens again, and instead of reporting it they go on a binge.
Guess what, ignorance isn't an excuse. I played one game, an MMO and the administration was very strict about this kind of thing. "If it seems too good to be true, it probably is. Report it. If you don't report it you're going to be held responsible."
That's the kind of feeling I have towards glitches. Staff can't predict glitches and we don't TRY to implement them. Even through testing we can't account for the sort of stress a 1000+ players can put on something as opposed to the handful of people who tested it under development. You'd be surprised at some of the elaborate glitches people have found... shocked me! Yet people think that just because they don't tell anyone that it's okay... it's just them, that won't hurt, right?