You mock the ever living shit out of the photo. Fascists love to look strong and mocking the photo dispels the myth of appearing strong.
*Edit: As Robert Evans said "blood is cool, milkshakes aren't" when talking about Richard Spencer getting humiliated with getting a milk shake thrown at him.
Yeah this occupied like 5 minutes of my family's time last night. Our daughter heard about it first. She ran upstairs and told my wife about the same time I saw a news article pop up. My wife and I just kind of shrugged and went about our business.
I'm just surprised it took this long for someone to give it a go. These violent delights have violent ends.
Make sure those water balloons have been sitting in the sun a bit. Gotta make sure that they had a chance to develop a nice smell. Bonus points, if you can get your target to puke everywhere.