I live in a christian home and so I am opposed to swearing and it's use in my games period. Though just because a game has some swearing doesn't mean I am not going to play it or judge overall quality just by it's dialog quality. My advice is to use it wisely (eg. The killer strikes again and the hero mutters under his breath "d---") It also depends on your audience, like someone who had grown up in a bad home or neiborhood probably doesn't notice or care if there is swearing in the games he plays. While if someone from my family were playing the same game they might stop playing or look at the game in a more negative way. Also, if your targeting adults then it carries less weight when they hear a swear word, no matter what religion or race. And then some swear words are worse than others and you'll have to take that into account to.