2 or 3 person I've found the "put em on blast" method to be quite effective. In your sitch prior to the FT being administered, "partner, I've got WHITE 14 & BLUE 11 in the backcourt."
They know you're watching, their coaches know & the fans know. Unless they are a couple of knuckleheads they generally knock it off.
If not, we all know where to send knuckleheads.