Wouldn't that be rich? If only it was possible, and they could really follow through with it. I realize many parents simply don't have that option.
We're planning on homeschooling when we move to PA, even though I read it is one of the toughest states in the nation for Homeschoolers. She's only 4, so I plan on being prepared for the inevitable fights.
Join HSLDA, Home School Legal Defense Association first.
http://www.hslda.org/Default.asp?bhcp=1
It's about $100 a year and they'll provide all legal assistance you need for that fee should you need it, provided you join BEFORE you have trouble. It's not a lot of money and great for peace of mind.
The other option, and I don't know how this works for PA, is to connect with a Christian school that has a homeschool program. With those programes, you are under the direction of the school and meet there once a week for classes like art, gym, etc. but do the teaching yourself at home the other days of the week. That way you're officially registered at school and can avoid the paperwork and coming onto their radar. It works for some.