If they >know< there's a bag of dog poop in it. I'm usually using opaque plastic bags from the grocery store so chances of detection are low.
As a practical matter, does anyone believe that dog owners are taking these bags of poop home, opening them up, and putting the feces in their toilets? If 1 in 100 does that, I'd be very surprised.
I walk my dog within a 55+ aged HOA neighborhood that has many neighbors walking dogs. Sometimes, several of us walk together. We have community rules on picking up the poop. Here is a recap as to what goes on with the walkers:
1. Some follow the rules and take the bags home (no idea what they do with them)
2. Some "look the other way" when the dog is dumping...anywhere...then leave the pile (unless caught in the ACT)!
3. One guy i know bags it and throws the bag down the nearest storm water drain (not a bad idea).
4. One lady I know bags it and then empties the bag in a wooded area and saves the bag for reuse. I suppose that's OK as the crap is there with squirrel and other critter dung.
5. Some people place the "loaded" bags in trash cans that are waiting for pick up. (that's OK too, unless caught by the can owner and he objects).
6. Dogs that dump in the unbuilt wooded areas seem to be "exempt" by owners. No rule here, but everyone seems to OK with it.
Dog peeing is universally accepted as "wherever" is OK. (Homeowners, most, but not all, here do not seem to be paranoid about front yard looks as the HOA does the landscaping, cutting, care, etc).