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.
Inferred Holocaust: London is saved when the steam castle explodes in the Thames but then you realize that a good chunk of London was frozen, blown up, and smashed during the latter half of the movie. Not to mention the flooding when the frozen clouds of steam melted. Regardless of how many weapons the foundations manages to sell, the British government will, at the very least, sue the living pants off the foundation for damages inured to their capital.
They might not be able, considering British military attacked first. As far as we know, the O'Hara Foundation probably didn't plan on attacking the exhibition, and they acted on Stephenson's claims they inteded to use the Steam Ball to cause trouble. Plus, it's also likely the foundation will blame it all on Simon; it kind of IS his fault, at any rate. It could also be blamed on Edward, but he simply disappeared after the Castle blew up.