Digital Information

For the past couple of days, we've been discussing digital information, copyright, copyright infringement, fair use, and Creative Commons.  In your own words, please answer the following questions:

1. Why should we use more than one label or tag to describe the same piece of information?
2. Why is Creative Commons licensing an important development for sharing digital information? 
3. Would you allow others to use your photos? 
4. What licenses would you apply and why?