Firefox Add-In Idea: Auto-Detect "Skip this Ad"

When I encounter an advertisement screen (sometimes euphimistically titled "welcome screen"), I can not click "skip this ad", or the equivalent, fast enough. I find it hard to believe that anyone else does differently. Anyway, seems like the germ of inspiration for a Firefox or IE add-in. It would contain a database of ad-presenting sites (traditional media, such as NYT, Forbes, etc), and detect the presence of "skip this ad" or "skip this welcome screen", and if so, would auto-click that link as soon as humanly machine-ly possible.