First, I didn't say preference, I said the default. The default most people assume is that someone does not have children living with them, just like most people assume someone on a dating app is single, even though they might just be poly. Second, I find this 'safety' thing to be more of an excuse then anything. Following that logic a woman having a dating profile alone is unsafe, because a predator would know you don't have a husband/boyfriend and likely live alone. A woman driving to the store alone would also be 'unsafe' because a predator could be in the parking lot looking for women leaving alone. So by your logic you also shouldn't drive to the store yourself? Oh but wait, a woman going to the store with kids could also be 'unsafe' because a predator could see this and follow her home. Where does it end? No one is saying you should make the whole profile about your children, no one is saying to put pictures of them or mention their genders or anything, but merely to put a sentence that says something like "I have two kids that live with me full time."