Nobody is going to bother, other than an occasional investigative reporter. Who reads terms and conditions online? They are written to discourage reading. The only way to get this under control is to require anyone selling your data to get specific permission first, showing what data they propose to reveal to whom and for what purpose. If this means the end of data brokers, well, so be it. The notion that ads that specifically target me are somehow "in my interest" has always seemed laughable.