The allegation > How Google copies content from other websites - such as restaurant reviews - to include within its own services Has nothing to do with robots

The allegation > How Google copies content from other websites - such as restaurant reviews - to include within its own services Has nothing to do with robots.txt - I don't know what Google does, but if it e.g. copies reviews from Yelp and includes them in Google Maps, that's not completely OK (it might benefit the users, but it also boosts Google's market share).