Homeschooling should be banned.
Nothing says personal freedom like banning an educational system you disagree with. Mandatory state education has been used to push a whole assortment of agendas from the evil (Nazism/Communism) to the innocuous (recycling). If parents disagree with something the schools are pushing, they should have every right to withdraw the kids from schools and pursue an alternative form of education.
We have an alternative form of education, it's called private schools. Last time I checked, the only form of education being used to push agendas are home schools, with fundie parents taking their kids out of school in order to hide them from evolution/LIBRULS/things that invalidate a parent's worldview ("IF THIS HIGH SCHOOL LETS GAYS DANCE AT PROM, I AM TAKING MY SON OUT OF HERE!").
Home schooling cripples children in regards to social skills and future career paths, and quite honestly it should be banned.
You need to check again then. Educators are constantly pushing all sorts of agendas. I don't know how you can spend any time in a classroom and not pick that up. Maybe their agendas just worked so well on you, you didn't notice them. The biggest agenda in education is conformity of the sort IndyTexas praised in this thread. Likewise the push toward conformity is at the root of the drive to shut down homeschooling.