I think that informatics lessons (or however they're called) should be really implemented. For example, in my school, there is only informatics classes from 7th grade to 8th, which is ridiculous, considering as well that the teachers barely knows how to make columns in microsoft word. It was such an easy course that many of my classmates got out of the course, which wasn't even optional. Maybe kids should learn from early the benefits and dangers of having internet.
The older people, or that simply are ignorant of how important and massive internet is, should also get informed, although I'm wondering how they will.
EDIT: once I read the article, I think the person that made the mistake was the late girl. Why would she add someone she doesn't know? Why would she trust him? I know there must be an emotional or psychological problem (like of low self-esteem maybe) in between, but why didn't she mention it to someone?