Security Issues with social networks

I have been using heavily social networks for the past 3 years, started with linkedin can now reach over 7,000,000 persons online. So the power of the technology is really incredible. Theses are some of the top ones I use:

• linkedin
• xing
• ecademy
  
• plaxo
• youtube
• slideshare
  
• twitter
• mypodcast
• lastfm
  
• myspace
• face book
• ...

But these social networks practical experiences are bring in some important questions (which will try to address over this year posts). Some of the main security issues I see are:

• propagation of malware (virus, trojans, keyloggers)
• defacement of profile, impact in public image
• who owns the data? some networks make it easy to get the data in but very difficult out (usage of images to protect contact information)
• how to archive and backup this data? who is responsible?
• how to delete the data permanently if required?
  
• predator attacks against minors and kids (parents must learn new ropes)
• identity theft, impersonation
  
• how to maintain so many user IDs (opendID is trying to address this)
• how to move data from one site, application to the other (open social is work on this), some users have seen this usage blocked after using automated conversion, migration tools
  
• how to do investigations, forensics on so many sites to track down criminals effectively
• how to separate between business, and personal lives?
• effects on corporate information
  
• leakages
• effects on corporate productivity
  

In short network, do business, have fun, but becarefull out-there.

More details on:

• CSO Blog
• Parents Guide
• At security focus
• USA Cert