Actually, my real life experience has been that women accuse their ex-husbands/ex-lovers of all sorts of abuses and I would say the main reason for that (other than when it's actually true, which it can be) is MONEY.
In CA, where I practice, the less custodial time you get, the more you pay in child support and the more custodial time you get, the less you pay in child support.
I suppose this was a way to make sure dads spent time with their children, but it's also a way women use to get more money.
No one is innocent on this. There are deadbeat dads and deadbeat moms.
And yes, it is about what is best for the child. But judges are human, too, and some are as dumb as posts, some don't care and a very few (VERY FEW) are intelligent enough to listen to both sides and make them work things out themselves rather than constantly bickering in court.
While I'm sure some men have made the threats, their threats don't have as much bite if the woman can accuse the man of domestic violence, not just against the children, but against her as well.
All kinds of red alerts go off and more money is spent on custody evaluations and supervised custody, and trying to get back the time lost for custody.
The system was basically written by lawyers (and as one I feel like I can say that) to make money.
The system should be made so that people are discouraged from bickering in court and working out their own problems.
Couples wanting divorce should be forced to show that they tried counseling when warranted (I understand not going for counseling if your spouse just hit you upside the head with a backhand or frying pan) and that it didn't work, but also forced to show that they attempted good-faith mediation and divorce settlement BEFORE filing anything with the Court.
The Court should only deal with those situations where the splitting of property may be more complicated than lay people can handle or if the couple really needs the teeth of the Court and its sanctions and punishments to get the job done.
Otherwise, work it out yourself (I know in CA you have every right to). Once in Court it's a strategy of trying to wear down the otherside by filing all kinds of paperwork and making the other side spend money like water.
Too often the judges don't reign that in and that's part of the problem as well.
While its true that women may spend more time on caring (especially if they stayed at home for at time with the younger infants and babies), but the father's role, whatever the AMOUNT of time it is, is also very important.
Initial custody should be 50/50 unless something extraordinary warrants something another arrangement. The evidence required for anything else should be closer to "reasonable doubt" than "preponderance of the evidence" (I believe there is another showing that is in between but the name is escaping me at the moment) in order to take away custody of one's child.
So, while it's not necessarily "feminism" at its core that causes it, I would say that women have learned how to work the system, if you will. Crying domestic violence and such gets them noticed and gets them sympathy, etc. And it shouldn't. Because for all those "crying wolf" incidents, the people who are really hurt by that are falling into the cracks and are harmed greatly by it.
All a woman needs to do is threaten domestic violence, rape or even child molestation and that's the end for the father, even if its not true. I have read about many men who still have "supervised" visitation with their children because their ex-wives "worked" the system and those men are 100% innocent.
The problem is not to count numbers on each side to see who WINS. The solution is to make the system punish bad behavior and reward good behavior. Encouraging people to work out differences, even if that means getting a divorce, but at least working out who gets what and having a custody arrangement that is healthy for the kids as well as the parents.
That's the real solution, IMHO.