https://arstechnica.com/information-technology/2017/03/how-i...

all the major ISP lobby groups signed on to a voluntary set of privacy principles based partly on the FTC framework. They specifically pledged to follow FTC guidance for opt-in consent before sharing sensitive information and to “offer an opt-out choice to use non-sensitive customer information for personalized third-party marketing.” Browsing history would be subject to an opt-out system.

Harris encourages Internet users to go to their ISP’s website or call the ISP to figure out exactly how they can opt out of tracking. It’s not convenient, but the option should be there.