"you couldn't say mean things about white men, but could about black boys"
"you couldn't say mean things about white men, but could about black children".
The linked article talks about children, not boys. You could never say mean things about black boys on Facebook (two protected descriptors), although the identifier of "children" wasn't protected.
And I think that I recall that in the Radiolab story, it was mentioned that this rule was changed, as it should have been, so that you can no longer say mean things about black children.
I get that connection speeds can be an arbitrary construct, but ISP's (small ones especially) buy their upstream connections by the megabyte (or terabyte or whatever). So the ISP costs are based on usage, making them direct costs. Or am I missing something.