Yup, that is my understanding as well. Likewise, if you're going around stealing, and someone happens to think that's bad, they can use force to stop you because there's no state telling them otherwise.
The idea that if there's no state we'd automatically be living in communist utopia where everything is shared and nobody owns anything is flawed on its face. It's certainly possible that there would be groups or tribes of people that choose to live that way, but other tribes would form around the idea that property rights should be protected and build a community around that.
Advertisers aren't interested in your privacy. Simple as.