Whether i would say something or not Depends on how close of a friend they are.
For example. I introduced my best friend to a fine Mexican broad i had known for years at that point.... who I knew was a hood rat, cuz she came up to us during a varsity football game.
When I saw they were vibin, I pulled bruh to the side with the quickness, let him know she got a pretty ass face, but is lowkey grimey. and will fuck any dude reppin a set out chea, among other things.
This dummy fell for the bait regardless sadly, ended up gangbanging partially to impress her, knocked her up and the whole nine. Once that happened I fell back on the criticism cuz I knew what time it was, it was something he would only believe in time.
She turned out to be a flunky ass parent, cheater and all that, but their child turned out to be one of the best I've had the privilege of knowing, off the strength of his commitment.
Best believe I rubbed that told ya so in his face whenever he complained tho!