Social Networking Security Issues
There seems to be a fine line between sharing personal information on social networking sites and privacy and security issues. Every social networking site has its own policies, and they can be found on their websites. Also, be careful about how much personal information you share in your profile. I am suddenly being bombarded with “birthday specials” from random places. Since I am not broadcasting my birthday to these places, I think they may be getting that info from one of my profiles. (I am about to remove my birthday from all of my sites 
While birthdays may not be a bad thing to share, the more information people with bad intentions have, the more likely they are to carry out those bad intentions.
I was recently asked specifically about resumes posted on Linked In. I believe that resumes that will be posted anywhere online should have addresses and home phone numbers deleted and only email addresses listed. If there is interest, full information can be given to the specific company or person who is interested.
Here is a link to a blog that gives evn more useful information on the subject: http://blog.mint.com/blog/moneyhack/howto-protect-your-privacy-on-facebook-myspace-and-linkedin/