To all the bashers: detecting AdBlock or other plugins like Disconnect is sometimes necessary for ad-free sites as well. Some sites malfunction when the user ha

To all the bashers: detecting AdBlock or other plugins like Disconnect is sometimes necessary for ad-free sites as well. Some sites malfunction when the user has such an extension installed, and it is a great user experience when the developer is thoughtful enough to put up a banner at the top of the page saying "This site may not work correctly if you are using AdBlock". (sorry for the "some sites"; I was browsing recently and saw such a banner, but cannot recall where). Of course the better option is to test your site under AdBlock and make sure it works regardless, but sometimes the detection is needed.