It might be worth making your browser add a X-T&C header that said something like ''If you misuse my data then you pay me £1,000,000''. It might be hard to make it stick in the courts, but part of the problem is one way T&Cs, you either get to accept it down to the last comma or nothing at all**.
This is part of the Internet 'wild west' that is well overdue regulation; there should be standard T&Cs++ that have been prepared by even handed (consumer/business) lawyers - that people could thus trust.
IETF might even make an official T&C header.
** I admit to being one of the few who I know who does read T&Cs and frequently refuse to accept and thus not use some web site.
++ With schedules to specify things like delivery dates, etc.