It's not a permanent solution, but perhaps the person is clueless enough not to realize it's way un-cool to dump your dog's doody (or anything else) in someone's private trash can and this might wake them up to 21st-century manners. Or just steer them to a neighbor's can.
My turn to rant a bit. The "Too Long--Didn't Read" version consists of "Don't be a 'coupon jerk' and hold up the line. Rules are printed on them for a reason."
So I went to Wendy's for breakfast before work. A woman was already at the counter ordering when I walked in. The woman kept changing her mind about what she wanted because she had this handful of coupons. She kept trying to change the terms of the coupon deals. For instance, she had a coupon for a certain biscuit, but wanted to apply it to a combo deal, which....to put it simply, you can't do. Coupon for item--you get
that item cheaper. Everything else is regular price. Then she had a Buy One Get One on another item (a coffee or something) but instead she just wanted one in a larger size. The cashier was having none of it, and I quickly picked up on how the cashier was being
extra stringent on the terms of the coupons because the woman was being a pain in the ass. I don't know how long she'd already been there, but I stood there ten solid minutes while they played volleyball with the coupons and terms. I'd entered the restaurant running early, and now I was behind schedule because of this nutcase. If it had just been a case of the woman not having the money to pay for her food and need the coupons to work in order to get something I might have had some sympathy/compassion, but this woman was just being irritating. She ended up having five different coupons shot down in flames (one was not even for Wendy's!), and by the time she left the cashier, she'd composed an a la carte order of miscellaneous items that ended up costing $8 that would have been around $6 if she had just ordered the combo and NOT used the one coupon that seemed okay to use/apply. By this point I had rolled my eyes so hard that I feared my retinas had detached.
I had had plenty of time to settle on what I wanted to order (though it had to be 'to go' rather than staying to eat, since I no longer had time), so my order was much quicker. I considered asking "Oh, do you take coupons?" and start digging in my pockets, but sometimes my jokes are not helpful. The cashier did not seem in a joke-y mood at the point.