Embodiments of the present invention address delivery of content, including advertising, in an online or networked digital environment. Undesirable content or content that needs to be removed from the digital environment may be eliminated through invocation of a ‘kill switch’ that terminates further delivery of the aforementioned content. The ‘kill switch’ may also eliminate certain instantiations of that content already delivered to end-user client devices. In order to lessen the need for termination of content following delivery to the digital environment, content developers and content providers may view content scheduled for delivery in digital environment ‘mock ups’ prior to actual delivery. Content developers and content providers, too, may control certain attributes related to content scheduled for delivery to further obviate post-delivery termination or modification.