Like young people are suppose to know how to pick a good mate from a WT.
I can tell you one major problem from my own past experience. If a young girl starts dating a man with a shady past and the elders know about it. You will be the last to know that you just married a sex offender,drug addict, hard core pornography, sex with family members,alcoholic and anything goes type of a person. One can live a double life.
I married someone like that and the overseer studied with his family. He was close friends with my father in law. Forty years later, still trying to understand why me, I was talking with my ex sister in law and she said the overseer knew everything about my ex! Probably not sex with family members but who knows! Here I was naive and did not know anything!
So I think this is a very important topic to warn the young JWs.