As the user above noted, even after you ask the user if they are truly 18 and to show proof, they say yes, then proceed to at some point when your guard is down, text you and talk about almost turning 18 and have erratic texting behaviors/ send you nudes when you don't request them / then proceed to switch user "this is Calebs Father who's been in an accident, proceed to call me and explain or I'm going to the authorities!" Which I presume is where they'll over the phone extort you.