I prefer that they be afraid to try to come here in the first place. Seeking across our southern border should be as dangerous as sneaking across the 38th parallel.
I’ve stated “landmines” for the past 10 years here. No guards needed. Just a clean up crew.
And that could well be the unspoken but underlying reason for separating children from parents. A mother won't put their child in a boat unless it's less dangerous than what faces them on land. If the fear of what happens to them here is greater than their fear of what happens to them where they come from then the problem takes care of itself.