So, tell me if I understand.
If someone says, "Why are these kind of pictures not allowed?" when it is clear why they are not allowed, I would respond, "(ry".
Or, if I was just posting, I could say, "Do you know what the best site in the world is? It's (ry" which implies the message was cut off.
It seems like DQN is equal to the word "n00b" in English slang.