People that ask for shiny legendaries w/ BG. (Remote trade)

People that are asking for shiny legendaries with a background knowing damn well that they don’t have one to trade back. What’s the thought process behind this? This is the second time I’ve had this happen to me and it makes me want to delete the person immediately. You don’t have a shiny legendary to trade, but you’re asking for one? That’s a joke! BG for BG. That should be known. No BG, pick something else without a BG.