I'm a deathfight fan in cyber, but I'm often the first person on these boards to step up and defend the dignity and safety of women doing this stuff in real life. An extreme fantasy is an extreme fantasy, but even online, I'd sooner chew off my own arm than upset or hurt someone who's not into it.
I used to agonize about my kink, but now I've found a group of mostly very kind and loving people who get off on this fantasy in a safe and consensual way. In fact, many of them are the most kind and ethical people I know online. I'll be honest, I fall half in love with a lot of them because I can see that they face their dark side head on, and in their real interactions with people are VERY kind and ethical.
So, yeah... it might not be how you think.