Enhanced scheduled pause - separate start and end times

The scheduled pause feature is a good start, except when it isn't. Specifically, if there are reasons I've disabled the internet (with children, this happens regularly), I do not want the internet to be re-enabled at any point. Today, a scheduled pause ensures that the internet starts, and stops, on a fixed schedule.  This is too limiting, and often undoes "undoes" my manual disabling. 

But here's what I know 100% - there is no reason my children should have internet after (e.g.) 8pm.  A scheduled pause with a Start Time, but no specified End Time, would accomplish this.