that happens all the time to me, I oversee some commercial properties as a side job and I catch people all the time. I had a guy doing a lawn clean up, throwing all his stuff, grass, tree limbs, etc in my dumpsters. I pulled in front and blocked him. He played dumb and I said cops have been called and you need to load up what you just threw in. he said make me, so I exited my vehicle and he went for something on/around his drivers seat, so I pulled my gun on him, told him he wasn't smart reaching for whatever it was he was reaching for. He loaded up the big limbs and drove around me. It gets so aggravating. We have extra dumpsters that we use for other properties as I clean them out and it pisses me off when I go to use them and they are full of other peoples crap
I had a lady who threw all her trash all over the ground, not even close to the dumpster. so i loaded it all up, drove 3 blocks, knocked on her door, told her husband next time I'm bringing the entire dumpster, dumped it on his lawn and left. he said I will call her right now.