These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Swallows and Amazons
Values Dissonance: The way the children casually refer to "natives" can be rather jarring, including in Secret Water, where they run into yet more kids with these pursuits who actively choose to be 'savages' rather as the Amazons are pirates.