Now that we’re all gender-fluid, treacherous men can abound as well.
My personal policy applies across-the-board. Men, women, children, the same rule applies to all.
The only time I can’t maintain the rule is when I am meeting with my own boss. But those instances are rare, and more often than not we meet in a common area which is generally visible.
It also helps to arrive at group functions exactly on time, so you are entering a room with many other people, and leaving as soon as possible, before the group breaks up.
I would cite a strong precedent born of institutional experience and a policy of many years in The Boy Scouts of America.
The policy is two deep leadership. One on one adult to scout meeting is prohibited. In the biannual Youth Protection Training required of all registered adult leaders, the need for two deep is soundly presented in many different circumstances. There can be neither misconduct nor accusations when adult presence is two deep.
VP Pence is following the policy in a different manner but for the same reasons.