AFN takes your/our privacy very seriously. We do all that is reasonably practical to ensure your/our privacy.
All of the comms are "https" ie encrypted.
If you are a regular guy, you should have nothing to worry about. If not, then there is nothing you can do to stop the Man from doing what the heck he likes to your privacy. There has never been and probably never will be a totally secure site. Any site that says they are 100% are lying.
But, for the average Joe, they will not be interested. But to answer your question, yes they could do all that and more. If they wanted to.
eP.