An anonymous reader writes "Ars Technica recently conducted a 12-hour experiment in which story content was hidden from users of popular ad blocking tools. Explaining the experiment, Ken Fisher appealed to Ars's readership: 'My argument is simple: blocking ads can be devastating to the sites you love. I am not making an argument that blocking ads is a form of stealing, or is immoral, or unethical, or makes someone the son of the devil. It can result in people losing their jobs, it can result in less content on any given site, and it definitely can affect the quality of content. It can also put sites into a real advertising death spin. As ad revenues go down, many sites are lured into running advertising of a truly questionable nature. We've all seen it happen. I am very proud of the fact that we routinely talk to you guys in our feedback forum about the quality of our ads. I have proven over 12 years that we will fight on the behalf of readers whenever we can. Does that mean that there are the occasional intrusive ads, expanding this way and that? Yes, sometimes we have to accept those ads. But any of you reading this site for any significant period of time know that these are few and far between. We turn down offers every month for advertising like that out of respect for you guys. We simply ask that you return the favor and not block ads.'"