Concerns About Children's Play Behavior

Lowkey, the vibes are off with this playdate situation. My daughter and her friend were chilling in a pool, but then he suggested a wild game, like holding each other underwater. Skibidi, that is not okay! I stepped in, but his grandma barely reacted, which was a major red flag. Then, my daughter went over to his house with a Cabbage Patch Kid, and when I picked her up, the doll was a total wreck—hair chopped, marker everywhere, and 'I kill you' scrawled on it. Not her handwriting, but he said it was his doing. Goon vibes for sure. Now I am on the edge about how to address this sigma energy in their play.