Learning from own mistakes is good, learning from others mistakes is wonderful. Way back in 2007 I received a email from a hacker asking my password. Though I was aware and quite sure this is a hacker I gave password to learn how the person other side is going to behave, it was truly risky and idiotic but I did that. As soon I provided password my email stopped working for obvious reasons. Next he emailed to all my contacts from my email telling them a story that “I am in troubled and trapped in a certain location and I need money close to Dollar 5000”. All my contacts were aware about what I was upto and hence I was saved.