That’s What the Sign Says
In a grammatical sense, the person putting their dog in the litter bin is actually following the instructions on the sign. “If your dog does a poo, please put it in the litter bin” does technically mean to place your dog in the litter bin if it poops. Okay, so we all know that’s not what they meant, but you can’t blame this guy for following the instructions.
A simple sign that said, “Please clean up after your dog” or “If your dog does a poo, please place the poo in a litter bin” would have been much more effective and saved a lot of dogs from being unjustly placed in a trash can. Luckily, most people are smart enough to understand what the sign maker was trying to say.