Immy
Unless the law is different in different states, I don't think social services would try so hard to place a 17-year-old who kept running away. In Texas, if a 17-year-old wants to leave home, the parents can't make him/her come back.
When my son was 16, nearly 17, we were leaving the country for a short vacation, and as usual, when we did this, we'd leave instructions with our attorney (wills, etc.) At his age, he didn't want to have to leave his school and go live with any of our relatives, so we instructed our attorney that we'd prefer he become an emancipated minor if, heaven forbid, anything happened to us.
Did anyone else notice the "Gilmore Girls" reference? Immy was April on GG a long time ago.
If you're too old to cut the mustard, you can always lick the jar.