Adult Magazines in Children's Section

So I am doing my thing is children's working on displays, helping customers and cleaning up, nothing serious. As I am walking passed a table with YA and MG titles I notice that The C.S Lewis Omnibus is in the wrong spot, and Laurie Anderson's Speak in its place. I pick up Speak and find an adult magazine underneath. It wasn't even anything classy like Playboy, the magazine was very graphic. I was freakin pissed, I really don't understand why someone would do that. I was just glad I found it. So I take the magazine away thinking its over. Never underestimate perverted persistence. I am away from the section for about 15 minutes. I get back to find another adult magazine (2 actually) this time on the table with picture books for fathers day. Again I was lucky enough to find it. This time I was beyond pissed, I told my manager. One magazine I let it go as fluke, two times is a pattern there will probably be a third time but it wont be on the same day as one and two. Of course I didn't see or catch anyone. I have yet to catch any of these pervs. These MF could be using their sleuth powers for good instead they plant adult magazines in children section. One day though I will catch one in the act. I can't wait.