BT writes: "In the old days, webmasters would try to draw attention to some new feature or offer on a site by including a pop-up or pop-under advertisement or notice. However, because 3rd party advertisers abused the service, most browsers have included pop-up blockers and AdBlock destroys them completely. So what did webmasters decide to do to get that pop-up effect? Lightbox of course. However, it’s still annoying."