"Second Life" can be used in a ton of different ways. It seems like if it is possible in real life, you can do it in "Second Life." There is crime in "Second Life" and even a currency. I feel like some people are at a great risk of getting addicted to this virtual world. I personally believe that it is a waste of time, and wouldn't want to get involved.
While there are some positive aspects of "Second Life" (can be used for education), I believe that it is not a good substitute for real life. People should not use it to hide from their true lives.