Southwest wouldn't let mixed-race family fly until mom "proved" parenthood

You clearly missed my point. While the policy seems to be to verify age, they use it in situations where age verification is ridiculous(newborn). They also have no leniency on this policy.
They are clearly trying to use it as some kind of check on trafficking. Now, this seems to be some internal Southwest policy. Not saying it is good/bad, just saying as a parent with no chance of racism being perpetrated against me, they have harassed me with this policy.
Fortunately, I just kept a copy of my child’s birthday certificate after the first time.