Website terms of service are not viewable until you have already accessed the web site. Unless the web sites give users an interstitial page wherein they explicitly click a button to agree to the terms of service before proceeding, then they would otherwise fall under Browse Wrap[1], for which most existing legal precedence favors the consumer rather than the web site. [1] https://en.wikipedia.org/wiki/Browse_wrap
You would get a pass on "the first time you accessed the web site", not "every time you did it afterwards knowing there was a TOS".
This all assumes you noticed it exists. There is another question of "can i be bound by the TOS if i didn't ever know it existed" vs "can i be bound by a TOS if i didn't bother to read and assent to the terms explicitly". The answer to the first is "mostly no" the answer to the second is "mostly yes" (but again, depends on the terms of the TOS).
This is what actual precedent is, anyway ;) The next question that gets asked is basically "what if i just lie and said i never noticed it, what do they have to prove", and the answer is "if you are willing to lie, this is a worthless discussion to have".