Selling a tool designed to circumvent DRM, even to make backups, seems straightforwardly illegal under the DMCA? I'm not sure that counts as an abuse of the law

Selling a tool designed to circumvent DRM, even to make backups, seems straightforwardly illegal under the DMCA? I'm not sure that counts as an abuse of the law... Using it to shut down emulators that don't help you circumvent DRM does seem like an abuse, though.