Madeline's family, or at least her grandmother, do not believe she is missing:
"Her sister's friends and other people I know have seen her, like at Wal-Mart or at the doctor's office, and they told me that they seen her,” said Madeline’s grandmother, Maureen Edman.
http://www.news8000.com/news/family-missing-daughter-not-lost/22819726
You'd think that one of these people who had supposedly seen Madeline would have approached her and spoken with her. I know I would if I saw a friend who had been missing for eight years just wandering around Wal-Mart.
Madeline's Charley Project page doesn't have much information. For instance, did Madeline take anything with her such as clothes or treasured possessions? Did Madeline have savings from a part-time job? After all, how does a 15 year old girl just start a new life like that with nothing?
And can anybody verify that Madeline ever reached her home?
What about activity on her social security number? Madeline would be 24 years old now. She has to be living off something.