I wish the OP luck as well, they are going to need it. And I fully agree that it isn't an easy place to be.
However, let us examine your bolded statement above.
If we remove all the elements of CD-ing, extramarital sex, and homosexual overtones from the fantasy, for a moment.
Correct me if I'm mistaken, ellbee, but you seem to advocate acting out a fantasy as a sort of pressure release; and that it could be potentially disastrous to not fulfill the fantasy. But you neglect to mention that what is healthy for one, may be unhealthy for others.
Using that logic, would it be healthy for an individual who harbours fantasies of hurting his/her co-workers to act them out? If Yes, why? If No, why not?
To quote an old TV show: "Sometimes a persons greatest fantasies are about the things they cannot do"