[fluoridation]

When I was growing up home LANs weren't common, but nowadays you could solve it with just a little box that does all the filtering in a way that can't be bypassed. Blocking connections to non-whitelisted domains based on the internal IP or MAC is pretty easy. If people don't use these solutions it's because they either haven't researched enough or don't want to deal with the inconvenience (or, in at least some cases, don't really care).