@BowsacNoodle id start with seeing thier understanding of the meme. if they get, never relax... then it's time for the serious talk. they are to the point then need the okay from you to take precautions. since they've been indoctrinated their whole school life not to. if it's their understanding a funny picture with naughty words funny. then you'd need to evaluate how they are going to respond and how new info will trickle to your younger kids.