Very often I notice that homework questions are accompanied by a very low OP effort in trying to figure out by him/herself what the possible answer might be. When I see such questions (which usually have quite trivial answers) I tend to comment "What Did You Try?" to try to get them thinking.
Now, could the acronym "WDYT?" be listed in the common acronyms, so we could use it in comments? Do you think it could be useful? I would see it as a signal to the OP that this community is somehow organized in not directly answering trivial homework questions.