Destiny doesn't really seem like the type to have the necessity of swearing, at least not as much as Halo did. I don't think it'll be a mistake at all, it seems like it'll be a great game without swearing. I honestly hope it doesn't have that much, if any at all. In my opinion, I feel it would have a negative affect on my experience, but that's just me. Of course its understandable if there was an endangering moment, such as their ship about to be blown out of space.