Hey, I have a younger sister who is 14. She is a freshman in high school, soon to be sophomore. She has been acting weird since last summer and it's starting to scare me. She is obsessed with computers and is a hacker. She hangs out with a group of other students, mainly older ones, at school who are also into this. She stays on her computer until the morning. I hear her up at 1 and 2 on the computer and talking on the phone, about hacking and cracking websites.
She is a member of some hacker community online. She has shown me the message board for this community and it is mostly made up of "elder" hackers, people in their late 30s and 40s who have been hacking for many years. She has buddies on this site, some who are around her age. They are being teased and made fun of by the older hackers and are called "script kiddies." This frusturates her, so she is trying to do really bad and serious things to prove her competence to them.
This obsession of hers has screwed up her school life. She has skipped school several times to be on her computer all day. When she goes to school she skips her classes except her computer one. She almost got suspended when she got caught messing with the computer in the school library, but she managed to save face by lying about the situation. She claimed that she was instructed by a teacher to perform maintenance on it. The truth is that she was trying to put a virus on it.
She has become very rude, irritable and smart-mouthed. She never gives a straight answer for anything. She brags about how she knows how to hurt people by messing up their computers. Smart girl, but I'm worried because she has a criminal mind. She reads constantly about things like how to trick security. One of her friends in the hacker community that she talks to is an old guy who sells stolen computer hardware. She wears a trench coat and combat boots everyday to look scary, and has stopped caring about her personal hygeine.
Our parents are divorced. I am 17. Mom is hardly home and our stepdad is a drunk who doesn't care about us. I am her brother and I care about her, I want to get her out of this and steer her toward better things. I am afraid she will get in trouble with the law if she continues with this stuff. But right now she is hardheaded and won't listen to anyone. She is getting deeper and deeper into this, she is going to bum a ride to get to a hacker convention this summer. Please help.

