Arguably it is too late, industrial scale piracy of user input demands a hapless data-entry caste. Even with the new content origin obfuscation attempts, watermarking, and 3rd world human content moderators.

No one is willingly going to tack on a variable cost to their business revenue model. At best, the crawlers/users will simply skip your hosts, or operate in places where gleaning data is still perfectly legal. =3