This is a big part how I feel. I do not mind ads in the way DDG does them or how my podcasts/YouTube (as part of the video, not YT ads) do them. Even though these are target, based on search criteria or an interest given the specific podcast/video, but I feel uncomfortable being tracked around the web and being served ads that way. I believe there are also a lot of ethical questions about how they are used. [0]

[0] https://www.youtube.com/watch?v=2wVPyiyukQc