Do you know there are many people around you are exactly like garbage trucks?They run around full with garbage eg. full of frustration, full of anger, full of dissapointment, full of hurt and full of resentment? And as their garbage piles up day by day, they will need a place to dump it and sometimes, they'll just dump it on you if that's YOUR day. 
What are you going to do then? Collect the garbage, pile it up then dump it on others at workplace, home or on the street?
My take is just smile, pray inside your heart and move on.
God made us in this world to do great stuff for Him and not to be bothered by minute incidents around us. Yes, people dump garbage on us but what does it do to make you better by dumping back the garbage to that person or to others? In our daily walk, we also dump garbage to God but imagine if God were to dump the garbage back? You and me can't stand the wrath from God therefore be gracious.
So, are you a garbage truck that goes around dumping your garbage on others? If yes, shame on you, RUBBISH.
L