Nah, it's not just online. And I'll put it this way I have about 5 mixed cousins, out of these 5 cousins only one looks black, one looked mixed(like a standard mixed girl with the yellow skin and black loose hair) but the other two?

One can pass for white, she's light with green eyes and blonde hair(I kid you not). One looks like a mexican boy--people always mistake him for being latino, he has the skin tone and their hair. In high school there were two mixed girls. One looked Indian--her hair and her skin tone. Everyone thought she was Indian and that's who she hung out with. Finally in her junior year, it came out that her mama was white and her daddy was black. You would never know it. She started claiming her black side eventually, but off sight, no one would have ever guessed she was mixed or had black in her. The other girl? Looked middle eastern/kim k in skin tone and hair. She hung out with only white girls, and no one ever even thought she was black. Once again we didn't find out, until graduation--her mom was black and her dad was white. We were all like...

The thing is, it's always a coin toss on how your mixed child will look, sometimes they'll look black, sometimes they'll look like a typical mixed child, and other times they'll pass for white, or other ethnicities. Which imo is another drawback to pawging or wenching--your kid may not even look like they belong to you.
My son has two cousins--one looks straight up like a white boy(he has a black mom and a white dad). When I saw my son in a picture with this boy at a family reunion last summer, I asked his dad, "why is that white boy at your family reunion". His dad laughed and said, "nah he ain't white" and he explained that the boy was mixed. His other cousin looks like a mixed child, and his white mom acts black and only fukks with bm too, but even her husband be telling her "nah you gotta cool it, you can't hate your race, your white" when she be trying to talk shyt about her own race saying she hates white people and whatnot--like she ain't white herself lmao.

She'll probably raise her son to be black. And honestly I have no problem with a mixed person that claims their blackness, associates with blacks, and dates blacks, saying they're "black" if they want to, but in all technicality if they have one white parent, they are not completely black. A white person can not make a black baby, they can only adopt a black baby. But they can create a MIXED baby that looks black, depending on genetics and what not.