That actually illustrates several points really well, thank you Illysia!
The main one, as you mentioned, being 'disturbing' and the level of it. Culturally, America (And other westernized cultures) are disturbed easily by some things, and very jaded towards others. This is different in other parts of the world, where our views on things would be horrifying to these other people.
Now as far as the uptick in violence, yes, I completely agree. That illustrates the cultural trend that's going on also. However, there's also stricter measures being put in place, ensuring that said crimes do not go unpunished. This, in turn, will offset the violence and create a steady minimum (is the hope).
Now, for the ME3 illustration, that simply served to highlight the whole thing. Of course the child is graphically illustrated as a key target during an "alien attack", one that is aimed to wipe out humanity, in a "Senseless, violent, and brutal" attack. However, ME3 is also lauded as a masterpiece of video gaming, both in storytelling, heart, and scope (that is another topic, however. Sorry for the rabbit trail.) The main point of this paragraph is that it can be a key 'tear jerker', or heartfelt moment. Of course, doubtless, there were players of ME3 that hated that inclusion, and it made them queezy. Perhaps those in other cultures didn't mind, or hated it even more. Culture =/= Opinion
Lastly, which again is a very....sidesbased topic, is that which Indygo and Illysia bring up so well. That of "Where does it start? Where does it stop?".
In short, PlaneShift is meant to be a player-controlled world within the settings, with minimal GM interaction. Optimally, this means a heightened realism (with a pg-13 setting). However, without fail there will always rise the issue of 'action being forced upon people'. Sad but true.
In 'RL', let's say (don't take out of context, of course), we as humans have action forced upon us at every turn.
In PS, we do not wish this to happen at times. We claim to want our characters to evolve due to outside influence, but we sometimes don't live up to that claim.
The reason boils down to personal preference, which is absolutely ok. We can argue moral ground and other points for as long as the sun'll hang in the sky, but that's honestly what it comes down to. Semantics include settings, ps dev requests, etc., but preference will always be king.
That being said, I respect everyone's preferences. The main thing to getting along in PS will be that ability, respecting others preferences. That means, as Tessra posted earlier, giving and taking in equal amount. There'll be things you don't like, and things others don't like. Always will be.
Illysia makes an excellent point when she says to have faith in your fellow player. Always assume the best, and these debates may never happen!
As always, I commend those with open minds who have posted here, which is everyone. Thanks for your time, and your willingness to dance around words. It's great seeing this civil of a discussion on such sensitive topics.