Totally agree. As a boy I played chess at the book store. This one man would always have long conversations with me and tell me about all sorts of books. (This was great, I loved reading.) After a number of weeks, he wanted me to go have lunch with him down the street. I felt like this was weird, and said no. The following weekend one of the other men, a math professor at the college, took me aside and said flat out not to hang out with that man, or go anywhere with him. Long story short, predators start by forming a friendship and building trust. If, for whatever reason, your kids don't feel like they can come to you first for things, then they're at a higher risk for predators.