It's disrespecting privacy. The examples you gave (Amazon and Netflix) know who you are. A better example might be looking at a product on the shelf at Best Buy

It's disrespecting privacy. The examples you gave (Amazon and Netflix) know who you are. A better example might be looking at a product on the shelf at Best Buy, and an hour later the sales guy shows up at your house asking if you're still interested. Browsing a website for the first time should never result in a phone call. I agree with the parent -- this behavior will result in a lifetime net of $0 from me to you.