I would toss those magazines out. If he says anything just say "Oh, I thought you were done with them". You do realize that he's attempting to get under your skin by leaving these magazines around.
This is a perfect response.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712