Personally, I keep my fantasies and my real life very separate.I haven't read all the posts so pardon me if I say something that has already been said. The first thing that comes to mind is that a fantasy is a fantasy and I hope that people can find ways to play out their fantasies.
However, it also goes through my mind that sometimes fantasies are gateways to far more deviant things in terms of experimentation. For example, a serial killer fantasizes about controlling his pets (because his parents badly control him). Then starts beating up his pets. Then fantasizes about killing them, then does it... then fantasizes about killing people... then eventually turns the fantasy into reality.
Not saying that is the case here or trying to say they are the same... I'm just saying that such fantasies that involve exchanges of power (consensual or not) need to be carried out by totally sane and maintained by people that know where the fantasy needs to end. IMHO it is more important to understand the psychology of why you want to explore a power-play/power-exchange fantasy than it is for you to actually explore it or even ponder it.
I've also learned not to divulge any of my odder fantasies or porn preferences to girlfriends, because they often end up trying to act them out with me. *shudder*