I'm having the urge to rub their nose in it.
Tell me the reason why you want to rub their nose in it.
They deserve to have their mistakes pointed out to them.
Rubbing people's noses in their mistakes is obnoxious. I'm sure they know they've done the wrong thing. Let them learn from their mistakes on their own.
Who are you to tell me what I should and shouldn't do to them. If I want to rub their nose in it, I'm going to do just that.
I'm just letting you know this isn't going to be a good thing to do overall. Like I said it's really obnoxious and they're going to be upset if you do this. You should explore other options to get your point across.