Being not from US I can't answer the legal part (here in France it's illegal and you just need to file a formal complaint) however: why you choose a Chromebook?

Being not from US I can't answer the legal part (here in France it's illegal and you just need to file a formal complaint) however: why you choose a Chromebook? People needs desktops, not modern dumb terminals/endpoints acting as WebVM bootloaders, so learn them from the start help kids a lot in both practical skill and pedagogical ones (they learn different things exists, strong and weak point of anything and they have comparisons terms), I mean Classroom works on GNU/Linux desktop I suppose, so why not just give you son a GNU/Linux desktop well configured and dedicate a bit of time aside to teach him basic and less basic usage?