This assumes that the woman KNOWS the guy's name. And this is not that unlikely if she's dating a thug from the hood who answers to a street name and does not give out his real legal name.
You make it sound as though only poor kids, or black kids, or Mexican kids are rutting around like dogs. Yesterday I learned that my lily white, high upper class nephew and his "long time" (never heard of her before) girlfriend are having a baby in February. I urged his mother to tell him to get a DNA test BEFORE he signs *any* papers WRT the baby. She scoffed and called me paranoid. Well, I tried.
I guess its just my week to be disbelieved on the importance of these sorts of issues. I think I'll change my name to Cassandra. Oh, the irony.