Ok I looked around, and there's several models of 'HP Chromebook 14', the earliest model has a screw, but the rest of them have a security device CR50 which you can unlock with a special debugging cable and a procedure which might be more trouble than it's worth ;)
I think it's kind of neat the way that it fails. It would be very easy for someone to accidentally poof and it's been factory reset if they didn't know how to handle this. I'm talking four mis-keystrokes easy. And a puzzle to solve in case it has fallen into the wrong hands? Sign me up, I guess!
I miss updates from GalliumOS, I guess it's time to move on, but I don't know if I could ever get all of the nice comfort features they built into their distro to be fully replicated on any other modern Linux distro of any kind that isn't specially focused on being a Linux distro for Chromebooks, like Gallium was!