I've been reading some of these posts and I'm amazed that so many are in support of Amanda and her tirades and running away.  
If I were the mom there'd be alot worse going on in regard to Amanda. Hello! She is 16. Not a woman...just has the hormones of one. Not the emotional and mental maturity. Maturity means you do the right thing in any given situation. Running away is not the right thing to do. She wasn't being beat at home. She wasn't being belittled. She was being told not to live with the boyfriend. I mean, come on! Many people go thru worse. When I hear a child say "I'm almost an adult" I always think...just for having said that - means you are not. (Just like when someone says "I'm so crazy" - it usually means "I hope you think I'm crazy and fun - cause really I'm not"). When you truly become an adult it just hits you one day...you are doing the adult mature things (studying if at school, working hard, paying bills, paying dues...)...not the adult immature things (sex, drugs, alcohol, letting parents worry). 
I'm amazed Amanda had cash and time to go and buy another phone. HELLO? Mom? You thinking? What if she took off and just kept walking? She had cash - she could have. Again, if I were that mom I would have taken the phone and purse/cash and not given them back until I saw a glimmer of responsibility. Like Carrol O'Connor says "Do whatever it takes..."