I've only been on Tumblr a few weeks but it seems to me that quite a lot of the 'social justice' on there is to actual social justice as spray cheese is to actual cheese. There is a superficial resemblance at times, but too much of it seems to be entirely about the pretence, about proving that 'I am more progressive and understanding and sensitive than you, and you are bad for saying/doing XYZ'. I get the feeling that a lot of the posters skew very young, which will feed into that, of course; certainly I was an insufferable little oik when I was a teenager, still learning everything about the world and working out how I felt about things outside the shadow of parental influence. (As it turns out, I feel more or less entirely opposite of my parents on quite a lot of things.) I'm frequently relieved that the internet did not exist yet when I was a child, and I don't envy either children or parents trying to navigate through it now.
I will freely admit that I don't feel I do enough in terms of challenging injustice in an active way, aside from voting, petitions, trying to be an ethical consumer and challenging and examining my own beliefs and those of people close to me, but turning oppression into a performative game of oneupsmanship is just...*disgusted noise.* There are gold nuggets there too, but you often have to sift through a lot of dirt to find them; and it's quite easy for people to look at the whole and think 'everyone here feels exactly the same way and that way is absurd, so I reject it all wholesale.'
As far as equality goes, I think...well, I think a couple things. I think that context does matter. In a vacuum, if Timmy punches Pete as hard as he can in the chest, and then Pete punches Timmy as hard as he can in the chest, those are equal actions. But what if we learn that Timmy is 4 and Pete is 36? Then identical actions are, in context, less identical, and it makes sense to judge the one more harshly than the other despite not being, on some level, 'fair.' If two people both steal a loaf of bread from another person, that's the same action, right?. What if thief A is starving and stole a loaf of bread from the table of wealthy business owner so they'd have something to eat, and thief B is a wealthy business owner who stole a loaf of bread from a homeless person for kicks? Are those identical actions still, or do circumstances render one worse (even if both are still wrong)? Someday we may live in a world where everyone is starting out on equal footing, and then everything would be a lot easier to measure; but we're a long way from that world, if indeed it could ever be fully achieved.
That said, people are going to mod what they're going to mod. None of it affects the canon, and it doesn't affect anyone else's game. Pretty much any mod could be deemed to be disrespecting the creators' visions but large games like DAI are a mish-mash of many people's ideas and influences in the first place (and I am sure that everyone involved will have had to compromise something, somewhere, because it's a group commercial enterprise as much as an artistic one). Plus, once a piece of art or media is out there in the world, the artist inevitably loses some level of control over it - not in terms of property rights and so on, but artists can't (and shouldn't, IMO) control other people's reactions to or interpretations of their work, even if they don't like them. Art history methodology has principles about this, about the role of an audience and how the act of viewing changes the object being viewed, and so on, but art history methodology is generally criminally boring and I've forgotten a lot of it because who uses semiotics in day to day life so I won't expand on that. 
Depending on the game, I find some mods indispensable, some interesting, and some stupid and distasteful (e.g. White Isabela, or body mods where all the NPCs are running around nude and fully erect...why???), but there's no excuse for harassing modders or anyone who downloads them. I may quietly judge and suspect the motives of people who use them in my own head (I definitely do, because I'm a giant misanthropist
) but hamfisted attempts at 'banning' things are generally pointless, or worse.