Internet Safety with my sister

My sister is 18 and we were able to discuss how she learned about internet safety growing up, and things that she still didn't know. I specifically told her about how her facebook and MySpace can affect if she gets a job, or not. Right now she's trying to get a job on campus at ASU in a writing center-type thing (I only know the BYU name), and so it's important to her to know who can see what. Although hers is hidden, it's important to make sure nothing too strange gets put on.
I think this has also reminded me about my own safety, especially with silly things. I think I'm going to clean up my facebook a little, too. I know I'll have to do a lot before I actually become a teacher--I don't think it's acceptable for students to try and "friend" me on facebook.
Back to Sarah, she told me about when she put pictures of herself by a dance studio she went to--that had the address in the picture--and how dad made her remove the photo.
safety isn't just about having an internet filter, either. Filters aren't fail safe--not only can you get around them, they don't black everything they should, and then they block things they shouldn't.