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Ahh.. true (to the bolded words... that's me). However, I believe that people living in "that century" ought to abide by their social codes.
Don't you think so? Meaning that foul words may change overtime but the social mores pertaining to their general use doesn't, even through centuries.
That is an interesting question. To begin with, it assumes that I consider myself in a position to cast judgement on other people's social behavior, which is not a role I'm wholly enthusiastic about. There's also the question of whether we're talking about the behavior of real people or fictional characters, because there is a huge distinction regarding the standards I have in place in order to think well of them. In the real world, vigilantism, stealing, and mercenary activities are things I mostly disapprove of. In fiction land, there's more freedom to contrive sympathetic circumstances for those activities, and I can enjoy characters like Garrus, Kasumi, and Zaeed without feeling any guilt.
Furthermore, I don't want to approve of the behavior of every character I meet in a fictional universe, because that sounds boring. In the real world, the first things I hope for from people I meet are that they be rational, emotionally stable, and considerate. In the fictional world, the first thing I hope for is that they be interesting. There's an overlap, definitely, but the priorities still shift between the two experiences.
As for whether I think conforming to social codes is a good thing in the most general sense...That depends. There are some positive benefits to the existence of social taboos. For some people, the desire to be thought well of is the only thing that keeps them from indulging any obnoxious whim that enters their heads. Even so, what society deems positive behavior is often either ridiculous or reprehensible. I could list ten things offhand that have, at some time in history, been the socially approved way to go about interacting with other people that are all absurd. Most of the ones I'm thinking of are associated with Victorian England, some of which still--really strangely--influence our perceptions of good manners today. Some of today's "bad" words are just yesterday's ordinary phrases, but since they were associated with the lower classes they gradually became taboo. So, do I think adhering to the social mores that implicitly venerate the perceptions of an outdated class system that--in my opinion--is abhorrent to begin with, is a good idea? Not really.