My wife and I routinely use ad blockers, private browser windows, browser profiles, and try to use as little ad-supported products as possible. This doesn't stop targeted advertising, I guess because most devices we use connect through the same IP. A couple of days after she starts looking up a city we want to travel to, I'll start receiving ads from airline companies or travel agencies, and even tours/cruises to said city/region. Fighting tracking and spyware is nearly a lost cause unless you become a digital Amish.