It is all about perspective. see, when someone else is trying to drop his trash in your backyard it is simply because his, its already full of it. It is not you, it is not within you, it belongs to that person, let him carry the weight of his bad intentions. If you get frustrated, his dirt, will make you feel dirty, if you reject the intention, it will go back to where it belongs. What you allow, controls you. Apply your Free will.