A friend recently sent a private email (regular email, not TreeMail). She tlaked about a procudt in that PRIVATE EMAIL.
She never Googled, searched, or shopped for it. Just named it in a "PRIVATE" email.
Started getting ads on many websites for that product.
Google, Hotmail, or someone HAD TO have read that email and listed her as worth spamming.
She may have accidentally clicked on something that permitted this, but never to her knowledge.
As we said back in the 1980s: never put anything in email that you would not want to see taped to your boss's door or mailed to your grandmother. There is no such thing as online privacy.
Now it's not just the government and hackers.
Internet providers (I guess) let any old company that gives them money read your mail.
it used to be just selling mailing lists. Now they let @#$%^& companies search your emails for ways to scrounge a nickle.
Pathetic Ferengi business practices!
Today, "private" mostly doesn't exist online. My guess is that Dave respects our privacy and protects it more than 90-95% of all other websites and service providers do.