Description: Three panels. The first panel is a picture of a sign on a window with Chinese that tells people to not to throw things out the window. There is a poor English translation on the sign that says "Do not shit in the air like a god." The second panel is D.W. from Arthur glaring at the sign. The third panel is D.W. saying "That sign won't stop me because I can't read!"
No idea, the only words that are correctly translated are "请勿" > "Please do not"
You're right, although it looks like they deliberately omitted some prepositions any conjunctions to save space. All the important elements are there, so it should be understandable by native speakers, but I guess that in speech, you would probably have to add a few more words in to make yourself understood a little more easily.
Interesting! Sounds like something that might be difficult for (early) machine translation, maybe before neural networks