I suspect most of us hide it. Even those few who are lucky enough to participate for real probably keep it pretty quiet. It is a strange fetish. You can find it in dozens of main stream sources. Every time a female celebrity is involved in an altercation, it is front page news. It used to be common to have mud wrestling or foxy boxing in most major cities. Many motion pictures, TV shows and soap operas, and even plays strongly focus on the fem vs. fem conflicts. Jerry Springer pretty much made a career on it. The male fascination with catfights has even been fodder for Comedy such as Seinfeld, Big Bang Theory, etc. Not to mention the hype in many female boxing matches and in professional wrestling. Catfights are almost common place. It is so common it is practically mundane, but at the same time, it is strangely taboo. We are all expected to enjoy and lust after catfights, just not too much.
In my case my thing is pretty much anything fem vs. fem, primarily focused on the idea of my lovely wife being one of the combatants. I kept it quiet for 7 years of my marriage. When I finally revealed it to her, she was horrified and nearly divorced me. I should add that I handled my coming out very poorly. Just pretty much blurted it out. I guess I was surprised by her reaction. I underestimated how much of a prude she was. There were many consequences of my revelation. Among other things, my wife insisted that I "share" my interest with several people including several of her friends and my family, largely to demonstrate how terrible it was. She also insisted on what amounted to years of counseling. It was humiliating and degrading to say the least, but in some ways very cathartic. For the most part, the response was kind of muted. I think they found it strange that it was such a strong interest of mine, but not the fact that it was an interest. In other words, they recognized the attraction, but not the strength of my attraction to women wrestling and boxing. I had felt extreme shame about my interest before I "came out". However, I came to realize through my process that in the grand scheme of things, this was a pretty tame fantasy and as long as it was just a fantasy, pretty harmless.