You're making me feel old. 
I spent lots of time in EQ and EQ2, met lots of nice people there I still keep in touch with. In fact I played SWTor with them too. They are the only group I'd consider playing any online game with for any length of time. Not particularly interested otherwise. Never got into WoW though.
I'm 36 in September. So I'm old too. Us old MMO vets should stick together. 
This isn't to you directly. I'm not trying to put a tone into your words that you might not intend, but I have seen those arguments used before.
Part of the point I was trying to get at is that having "mature" content, like blood or gore or sex, can appeal to everyone, not just "the kiddos." I heard the same claim about "kids" applied in games with a "nicer" faction, that it was for people that couldn't "handle" being bad.
I don't think it's immature to enjoy having blood or gore or nudity or language in a game. However, I don't think that it's immature to prefer games without those elements. I play all sorts of games of various ratings. If I'm having fun, I don't give a flying pyjak about the rating.
As I've stated before, my feelings in regards to ME's content as well as it's rating (as of ME3 anyway,) have not changed. I do prefer the ME series as an M rating. I am also in the camp that feels those filters would be a waste of time if ME:A was going to be M rated. They should probably just tone down the content and go with a lower rating rather than using all those filters. If they decided to make future ME games rated T due to cutting out blood, ect ect, then I'd respect their decision. As long as I feel like I got my money's worth, I'm open minded. A game rating isn't a decision in my game purchases, most of the time.
Sometimes reading this thread bugs me a little bit though, mainly due to the responses the OP has gotten from some...people. I will never think it's right to call folks babies or kids just because they would prefer a game in this way. Also, I do like how respectful the OP is trying to be about their request. It isn't in a demanding tone, and I think the discussion of ratings, theme and tone for ME games is a great one for the BSN. Plus, they got a dev to come and give some feedback, so I'd certainly consider this thread a big win.
In all, this has been a wonderfully civil debate to read and participate in. 