PSA: Limit Fortnite voice chat or your kid will hear things

My 11yo had his mic on in a squad match last week and I overheard a grown man drop several F-bombs and some genuinely disturbing stuff. I thought the game had built-in filters but apparently not with crossplay? Anyway, he's on party chat only now with just his friends from school. Just a heads up to any dads out there who think voice chat is fine because "the game is rated T for Teen."