I'm unschooling with no dramas in Western Australia. We are technically supposed to be following the curriculum but it's so broad you could cover it easily from just doing what you're doing already and then some. You do have to "answer" to the Education Department but this is done by registration and an annual meeting with a moderator and when you have a good one that understands unschooling and that gets you (which I do), there are no problems. I get snarky at having to do it every now and again but practically it's a hell of a lot easier than a lot of other places.
We unschooled in both Oregon and Arizona without any issues. We're just finally done. Phew. Things change all the time and are getting notably stricter as time goes by from what I see. Arizona requires that you do some particular subjects, but unlike @ryivhnn in Australia, I believe it was just some occasional paperwork and no meetings at all. But again, things do change.