dealing with rude, old, cranky neighbor

so i am the proud dog mom of a boxer. he’s my world. i am also a responsible dog mom and i clean up after my dog when he poops. if i happen to forget a doggie bag (which is RARE but i’m human and imperfect) i ALWAYS let him finish his business, take him back to our apartment, then go back and clean it up. always. anyways this morning our dog woke up at 6 and my boyfriend took him out. they come back in. he says he peed and pooped and then we all fall back asleep until 7:45 when our boy finally gets back up and i get up and feed him and give him water. 20 minutes later he’s whining and acting like he needs to go potty which I thought was weird because usually it takes an hour for him after he eats but I assume maybe he just has to pee so I don’t grab a doggie bag because of course he doesn’t need to poop right 🙃🙃 wrong. we walk out and THE FIRST THING HE DOES IS DROP HIS BUTT AND GO POO....RIGHT IN FRONT OF THE WORST NEIGHBORS APARTMENT. i start panicking of course like i have no bag, this is the crankiest woman (she literally has these dog repellent sensors at her “lawn” that makes these high pitched sounds that are supposed to deter dogs but literally the patch of grass is right by the door and all the dogs run to that area to pee sooo clearly they don’t work) and i didn’t think my dog had to poo because his food hadn’t been in his system long enough. i was just praying that maybe she was still asleep. i was wrong. she barges out and says “you’re going to pick up your dogs poo right” and i of course say yes that i forgot a bag upstairs because i didn’t think he had to go but once he was finished i’d come back and she was like “well i’ve stepped in his poop out here before” and i said “if you stepped in poop out here it was another dogs because 1. 9/10 times i have a doggie bag 2. he never poops right here. only pees because this grass is right by the door. he poops in the big field behind the apartments because usually he has to walk a little before he goes. this must’ve been an emergency for him. please don’t accuse me or my dog of something we didn’t do. and if you don’t like dogs why did you move on the bottom floor of a dog friendly apartment?” and i walked away. i of course went back to pick up his poop. currently looking up leash doggie bag holders online 🙄🙄 what do you do with rude neighbors???