The CFAA makes it a federal offense to intentionally access a computer "without authorization" or "exceeding authorized access" so the sticky part is how far the site's ToS can go in defining what uses are authorized, lest it be a federal felony to use an ad blocker or whatever else might be forbidden in a ToS.
The CFAA makes it a federal offense to intentionally access a computer "without authorization" or "exceeding authorized access" so the sticky part is how far the site's ToS can go in defining what uses are authorized, lest it be a federal felony to use an ad blocker or whatever else might be forbidden in a ToS.