Sorry for asking, but just how does one poop in a balloon? And who would be that level of unsanitary?
Well... It is my sad state to acknowledge a certain familiarity...

I built a water balloon gun out of a surveyors tripod, 10 ft of 4" PVC and a garage door spring... It was magnificent. Set up on top of the college building on main street, since I could remember the angle and direction, We (me and Richie) dialed that puppy in on a stop light 2 blocks away, aiming for the second car in a theoretical line of stopped cars... Noted the increment, angle, and direction, and marked the position of the legs...
The next night (Saturday night), whoever the poor bastard was in the 2nd position on the inside lane got a fantasic peppering of water balloons... I mean, it was grand. It was really easy to load, and like a mortar team, we got real good at it... By the time the fist one hit, we could get 7 or 8 in the air following.
The absolute highlight of the evening was a literal bombardment of a late 60's Pontiac Bonneville ragtop (with the top down) STUFFED to the gills with young ladies...
I swear I had never laughed that hard ever in my life. And we never even came close to getting caught - Even peppering the cops with abandon. The angle was so high and we were so concealed that no one ever figured it out. It was one of the very best few weekends of my life. By the time we were done we had it dialed in on the sidewalks, various cars in the ordered length of stopped cars waiting on the light, and eventually even pot-shotting traveling cars going through intersections. All from a couple lawn chairs on the college building roof, with a cooler of beer between us, and a couple hundred water balloons per night.
BUT, certain events happened some time thereafter requiring vengeance... As to the type=pig... As to the how= Watered down a bit and stirred smooth, loaded into a 5 gal bucket, with a pneumatic grease gun for a lid... As to the hygiene... Shrugs... Ain't like I ain't seen pig sh*t before (like, daily). As a redneck boy, I am well acquainted with all kinds of sh*t, and as immune as one could ever be.
As to the target, well that will remain unsaid. But it was a big target, of reasonably high value, with it's occupants, and all thoroughly coated before we relented.