The closest thing I can think of is I once traded a surf board (waaay back in like '04, so it wasn't worth as much as the new ones, I don't think) for a beginner top on my FIIIRST day on the game, 'cause some jerk took advantage of my newbiness. And I used to sell my ores to NPCs rather than keep them, because they took up space, which sucked when I realized how many things I needed them for. Other than that, I've always been careful.