About what? WW2 or the IRA bombing campaign or the 7 July 2005 islamic bombings?
There is an extensive list of terror attacks on London on wikipedia: https://en.wikipedia.org/wiki/List_of_terrorist_incidents_in_London Which one do we not “shut the fuck up” about?
Yeah, could also have two Pi-Hole instances. One is network wide and block ads for everyone, and the other is the DNS the kids PCs use, set with a white list of approved sites only. You can set Pi-hole to block everything (set * as the a RegEx filter) and then add domains to the white list to be allowed through.
Groups is probably more efficient but two instances could be offer more options/nuance on how you run things.