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.
Hitler's Time Travel Exemption Act: Possibly averted in that it is explicitly mentioned and stated that killing Hitler is not possible, this is due to Jackson's limitations with time travel, but the option is never brought up again even after time travel becomes powerful enough to carry out the act.