That only deals with types of requests, or the user making the request etc. It doesn't do anything about how the requested data/info etc is used. I suppose it is closer to a licence agreement. I don't think that there can be any technical way to enforce it only some sort of legal way.
Yes. Technology to restrict usage sounds a lot like DRM, which has many downsides. Enforcement, ultimately, will rely on good old fashioned copyright and licensing (contract) law.
