I've known some couples to do milder things like smoke weed together, but if your SO did something more severe, like stalk somebody, harass them, threaten their life, or try to hurt them, would you support them?
I've met some people that would put up with major problems, but then oddly enough end up dumping their SO for milder reasons, and I find that women will put up with way too much just to keep a relationship and the illusion that their SO isn't a bad person or that they wouldn't do anything like that.
Depending on the circumstances, I've seen people say that sometimes they'd be okay with doing bad things to others as long as it was for a good reason, even when it was pointed out how there's never a good reason. I know that when couples do these things together that they're more likely to be tight-knit, but I know that's likely not true for most couples, and not everyone shares the same idea of what's okay and not okay, so what would you all do if you found out that your SO did something horrible? Would you support them, depending on what it was, or would you disapprove and choose not to enable them no matter what?