Yeah, I went down this path with my router. Found some list, wrote a script to keep it up to date, and blocked it at my DNS server. I found that it was ~80% e

Yeah, I went down this path with my router. Found some list, wrote a script to keep it up to date, and blocked it at my DNS server. I found that it was ~80% effective, and broke about ~5% of the websites I used. Its super good for targeting a specific ad network, if you dont need anything else from those domains. Some interesting examples where it didn't work: 1. wowhead.com: this site hides the source of all of its assets behind its own proxy, so the content you want, and the ads you dont want come from the same place. A traditional ad blocker works fine here. 2. Google: it is really hard to block google's ad domain, but still use google's services if you are doing it at the DNS level. There is an argument to be made for DNS blocking though. If you want to take the moral high ground, then it is a good method. IE, if you don't like google spying on you, why do you use their services at all?