How about: if you want me not to scrape it, keep it off my internet??
Actually I'm considering building "API-fication" of websites with bindings for major languages (Java, Python, JS). With luck websites could participate by providing & maintaining a parseable API-sitemap.
This would open door to my 2nd project: orchestration a-la BPEL on top of websites. visual editor, macros, scripting. Call this PIPES 2.0