MySpace and Facebook

I guess I am to old to be wowed by these sites. I did create a Facebook page but I hesitate to put anything personal on public sites. My niece was contacted by a sex offender just recently on her MySpace page along with many of her high school classmates and is without her family computer while the Sheriff tries to prosecute the offender. He was able to contact her even though her website was set to private so beware. I would rather do real stuff instead of spending a lot of time posting about it. Just my two cents.