there's as much bro science on hair in the black community as it is on protein in the weightlifting community
i hate to break it to you guys, but shaving your hairline isn't going to make you bald. no different than edging up the back of your head would make you lose hair there.
remember... correlation does not equal causation
I don't know many white or asian dudes who's hair has fully receded by age 30, but I know hundreds of ninjas who are rockin' baldies. Correlation =/ causation in a single random event, we are talking about empirical results here broski, it ain't one or two nikkaz with receding hairlines due to Slicey the Shapeup Man and Rubinga the Alchohol Lady