That’s literally absolutely unequivocally incorrect. I have no clue why you think that but even a cursory glance at Wikipedia would have shown you you’re incorrect. en.m.wikipedia.org/wiki/Terms_of_service
If you want more information you can go ahead and read up on GDPR or one of the numerous other laws around the world stating exactly the opposite of what you’re saying.
However, courts generally do not require that you actually have read the terms, but just that you had reasonable notice and an opportunity to read them.
The majority of illegal immigration into the US has nothing to do with walking across borders anywhere. It’s people overstaying their visas, and they got to the US on a plane. The whole Republican thing about immigrants marching across the borders is one of the most fantastical stories they’ve made up to make democrats look bad.