Men checking women unsolicited that aren't their daughter, family, or friends is a lesson in futility. Women and their family have to do that.
What we can do is ostracize and quit associating with that guy in the original post that has multiple baby mama's and/or is a deadbeat. I'm sure plenty of his friends know he's a piece of shxt but still continue to be friends with him instead of checking him on his bullshxt.
Men were checking Men back in the day. Now we try to check women instead, and it clearly aint working.