I don't know how much weight courts currently place on click-through contracts, but given how many such contracts we "agree" to in modern life, how impenetrable

I don't know how much weight courts currently place on click-through contracts, but given how many such contracts we "agree" to in modern life, how impenetrable their jargon is, and how often they change, we should be extremely cautious about giving them too much, or any, validity. E.g. how would you feel if some no-name free website/service sneaked in a "you owe us $1000 if you use this service on Tuesday" term into the novel that is their ToS/EULA? Or if the grocery store put up a "by entering you agree not to disclose our prices to others" sign?