The "funny", as you say, is in the fact that instead of answering Good Cop's question, Cop Who Likes Space Jam says that they should watch Space Jam. The punchline is the random offer to watch a movie. I'd say this is common sense in this age of the internet, but you clearly don't have much of the previously mentioned common sense, considering you made fun of someone for reading the Terms Of Service. Have a good rest of your day, and
next time remember this reply before calling a perfectly fine meme unfunny.