Social Networking

I am just amazed there is over 200 social networking websites. I have had a Facebook account for awhile - got forced into it in the end. It just isn't my thing but I know a lot of people who use networking sites to contact old friends and meet new people. I actually know a real person who met their partner on Facebook and they are now married and living overseas. The sharing of photos on Facebook is great. My mum is 79 and she uses Facebook all the time. The concerns I have with social networks are that sometime people put far too much personal information on the internet and this really scares me at times. Also I know it is very hard to get your profile off Facebook or Myspace.