By Tobias Carroll Most of the time, the accepted takeaway of watching a tale of a high-profile scammer is a cautionary one — namely, ways in which you should not behave if you don’t want to find yourself in legal trouble and facing time in prison. But what about a scenario in which someone watching Inventing Anna decided that the moral of the story was to shout at people in an implausible accent until they give you what you want? Last night’s Saturday Night Live provided exactly that, as Chloe Fineman discovers the benefits and horrors of “Delveying.” What does that consist of? Largely insulti…