Ref T12272. If you own a package which owns "/", this allows you to force-accept package reviews for packages which own sub-paths, like "/src/adventure/".
The default UI looks something like this:
[X] Accept as epriestley [X] Accept as Root Package [ ] Force accept as Adventure Package
By default, force-accepts are not selected.
(I may do some UI cleanup and/or annotate "because you own X" in the future and/or mark these accepts specially in some way, particularly if this proves confusing along whatever dimension.)