It’s not about posting data. It’s about collecting the records of every phone call, what number called what number, and when. But the principle can also be applied to the content of emails. The reasoning was by using a third party to transmit anything you give up your right to privacy. I don’t agree, but it shouldn’t be enough to vote against him.
Being a former IT admin, I know enough to know that anyone with a little knowledge can eves drop on anything electronic. This is nothing new. The government as been doing this for decades, even before the commercial Internet. AT&Ts network was basically a giant “telephone bug” where the government can monitor anything, anywhere, anytime since the 1960’s.
It was one of the reasons why AT&T had a monopoly in the first place given to them by the government. AT&T has over 900 massive data centers across the United States, and thousands of smaller ones. Everything you or I do, crosses that network, even if you don’t have AT&T for anything. We are all “customers” so to speak.