I dunno. I automatically assume that everything that passes any third-party site unencrypted can be intercepted, retained and subsequently disclosed to advertisers, government, or whatever else. This especially applies to for-profit companies for which I'm not a paying client but the commodity being sold. I mean, I don't need to read TOS to assume this, it's just common sense to me.
Oh that's the case for pretty much anyone on HN I am sure. I was explicitly referring to the rest of the population that is largely illiterate when it comes to technology (they just consume).
There are similar warnings on products like food, drugs etc...
Probably I've been on the internet for too long.