Click Trajectories: 1. What was the most significant lesson you learned from the paper? 2. What was the weakest/most questionable part(s) of the paper or how could the paper be improved? 3. Was it ethical to make purchases from spam-advertised sites? What do you think? Framing Dependencies: 4. Name a technical research challenge for the computer security community that (based on this paper) might, if solved, help with Internet crime. 5. Optional: What topic would you most like to see discussed in class, or question you would most like to have answered, if any?