[TeMPOraL]

I'm also on the side of user retaining full control over the content he/she consumes, but there's an important difference here - in case of ad blockers, it's your choice as a user to not have ads displayed (or have them changed to something else). However, in case of Privdog, it's a third party changing ads without your or ad-displaying site's knowledge or consent. So maybe I, as a user, did choose to display ads on some site because I want to support them (I do that every now and then if the site asks nicely) - but then the site still doesn't get any of my money because some scumbags injected their own ads.

It's a clear theft - a malicious third party that intercepts money exchange between two other parties without knowledge or consent of either.