Why a 7th grader should care about their online persona

I've been asked to speak to my daughter's 7th grade computer class about using social networking web sites like FaceBook and MySpace.  Following is a brief outline of topics to frame my 30 minute time with the kids.  My goal is to discuss some of the bigger issues relating to privacy, online behavior, and data shadows.  Please let me know if there are other topics that should be addressed or better ways to say these things to 7th graders.

Some background

Our school district give kids a district email account in 8th grade so the full entry to FaceBook is not far away.  Nearly all the kids use SMS, IM, and have experience with some kind of kiddie social networking like WebKinz.  Kids know how to use the tools.  They don't understand the implications of having 10 years of their LifeStream on the littered across the web.

Discussion Topics

1. What you put online stays online - a lot longer than you think
   
   
2. We all leave a "data shadow" from our use of cell phones + SMS, web, credit card transactions, health care, etc ...
   
   
3. A picture is worth a thousand words! Think before you pose.
   
   
4. Who's your friend? Is there a difference between your friends  and your "online friends"?
   
   
5. Manners count.  What you say says a lot about who you are.
   
   
6. When you apply to college they will look at your FaceBook page.  Does your FaceBook page represent the same person are your college application?

Comments and suggestions are welcome.

Further reading:

Leaving 'Friendprints': How Online Social Networks Are Redefining Privacy and Personal Security