Advertisement blockers are a controversial topic for many webmasters. I can see why some users use them as there are sites out there that throw that many ads at you, banner, flash, animated, with sounds, or popup, that it becomes a burden to navigate those websites properly.
What I do not like on the other hand are users who block ads on websites that do not implement these annoying types of ads, especially if they visit those websites regularly and like what they read. Why? Because a site like Ghacks would not exist in its current form, or maybe not at all, if it would not generate enough revenue through advertisement.
Some website owners try to protect their websites against users who run ad-blockers by locking them out. They run scripts on their sites that prevent access to contents if they recognize an ad-blocking extension or script.
To counter this, browser extensions have been created that make these anti-adblock solutions useles.. It is a cat and mouse game more or less. The adblock detection and blocking scripts get updated regularly with new technologies so that they block adblockers temporarily. The developers of extensions that make anti-adblock scripts useless find new solutions to bypass these new protections, and the cycle repeats itself.
I do not encounter anti-adblock scripts regularly, but that is likely because I'm using NoScript and no traditional adblocking extension. Even if that would be the case, I'm pretty certain that there are not that many sites that have implemented anti-adblocking scripts.
Anti-Adblock Killer was mentioned in the comment section of yesterday's no pic ads review. It is a userscript that you can install in your web browser to bypass certain anti-adblocking solutions. According to the profile website, it works with Antiblock.org Script V2 and V3, RTK Anti Adblock Script, and Anti Ad Buster Script.
More than one hundred websites are listed here as well that implement one of the anti-adblocking solutions. The userscript works best in Firefox, and only partially in other browsers such as Chrome, Safari or Opera. Firefox users need to install Greasemonkey or a comparable solution to run the script, Chrome users need Tampermonkey, and Opera 12.x users Violentmonkey.
All extensions needed to run the script are linked on the script's website. Once you have installed the script it works automatically if it detects an anti-adblocker script on a website.
Note that it is likely that you will experience periods where the script does not work, which is usually the case when a site has updated its anti-adblock script or changed its implementation completely. You can report those to the developer of the script.
If you hang out on sites that use anti-adblocking scripts to protect their contents, then you may want to give this a try to bypass the protection on those sites.