I do think that social networking sites are a great way to keep in touch with friends and family that you don't get to see that often. I know it makes me feel good when a friend that I haven't seen in a while writes on my Facebook wall, just to let me know that they're thinking of me. And I like keeping up with what's going on in my friends' lives. Actually, Facebook is one of the only ways that I keep in touch with many of my high school friends who all scattered after graduation. But I also think that you have to be very careful about how you present yourself on a social networking site and what you allow others to see.
For example the other night, my car was towed from my apartment building because I had forgotten to put my hang tag back up after I had taken it down the night before. So, when I walked outside and realized what had happened, I was very upset, and I posted my feelings in my Facebook status. On the following Sunday, my grandmother asks me "What happened to your car last week?" First, I was upset that she had found out about it (because her and my grandfather have a tendency to worry about me, so I had taken care of the car problem and not told them anything about it). Second, I was stunned that she had found out (unlike some of my friends, my grandparents have not yet joined the social networking world). It turns out one of my friends of Facebook is a church friend of my grandmother, so at church, the lady had asked about my car. So really these social networking sites just work like one big gossip chain.
I guess my grandmother finding out about my car wasn't such a big deal, but what if it had been something more serious? What if a potential employer had seen my angry status about my car being towed and because of it, refused to offer me the job? I guess what I'm saying is that you never really know who is reading your Facebook posts or status updates, and therefore you have to be very cautious about what you write. Because even if someone isn't reading what you post on your social network site, they may have a friend, acquaintance or collegue who is.