There was a big ruling in Canada about this specifically around MLS, the big real estate monopoly we have, so that if you go to their sites to search for homes, like you'd see at Realtor.ca, you have to click through a clickwrapper to access any data, and even if you automate past that, the fact that a human would have to click it means that it's illegal to scrape since you are forced as a human to agree to a TOS before you view.