I assume people claim IP protection of one kind or another on these datasets, and even if their claims were spurious, they would still make trouble. That's not

I assume people claim IP protection of one kind or another on these datasets, and even if their claims were spurious, they would still make trouble. That's not going to stop some hacker could crawl OkCupid and balckmail some people. But if Google or Microsoft suspect FooStartup Inc. is using one of their datasets in its service, then the lawyers will descend.