i.e. Combing through public forums on the internet looking for evidence of thought crime, however, is fair game. The Trump admin will undoubtedly use tools like this to compile a list political enemies or undesirables, which they will then use to harass people or selectively restrict individual rights. They're already doing this and this is just going to make it easier for them.

Yes. And I'm sure the next administration will as well. These things only ratchet in one direction.