I seriously doubt any such attempts to sidestep will succeed in a world where the problems is not just technical (you may be able to fool the sandbox enforcing system), but a matter of getting your app approved, not just once but with every update, small or large.

The added complication is that in this case LaTeX itself decides to spawn a few calls to various utilities it uses under the hood. Those attempts will simply be blocked by the OS inside the sandbox. So you won't be able to typeset successfully.