I don't think the older phones matter as much, it may have been before a vulnerability was thought of, but the Xoom is an excellent point. I can only speak towards how I'd architect the kernel to protect the network, which should be VZW's primary concern, and I have little knowledge of how the Android-specific kernel is architected. I haven't checked the diff between the Google and Moto kernels (BTW, *ALL* distributed kernel changes need to be published as open source or you risk being sued by the EFF - GPL infection and all...).
Do you have any theories as to why VZW would care about locked bootloaders?
Do you have any theories as to why VZW would care about locked bootloaders?