User blog comment:Brandon Rhea/Ad Tests on Fandom/@comment-61022-20170427195612/@comment-20644-20170427210827

Our ad rules generally say no auto-sound, so if you ever see any of those then that's most likely the result of third party ad exchanges not following our rules. We can remove them if you alert us to them.

Same with pop up ads (understood as meaning, ads that open in a new window). Those are also against our rules and can be removed when found.