Disagree. By playing a rape/sexual assault fantasy game (or, in other words, fantasizing committing about rape/sexual assault), you cause the desire within yourself for rape/violent sex/sexual abuse to grow. Just like with an addiction. No one wakes up an addict. It happens like this:
- Someone has an unhealthy desire.
- They indulge it.
- The desire grows stronger.
- The way they indulged it before no longer satisfies.
- So they indulge it in a more extreme, focused way.
- Repeat.
It may be that not everyone who plays SA fantasy games like this will follow through and really do it. But do you seriously believe that someone who fantasizes about sexual assault (and is aroused by it) is less likely to actually do it than someone who doesn't???