I'm considering adding the following clauses into the first bit of our FAQ:
How should I answer?
Make sure your answer adds helpful information and is a complete, stand-alone answer. Read other answers first and be sure not to completely restate information that has already been posted.
Please note that answers should be backed up either with a reference, or experiences that happened to you personally. You should always include in your answer information about why you think your answer is correct.
This will give us something to point to (the FAQ) stating that duplicate and totally uncited answers are not okay. We seem pretty strongly in favor of backing it up, (also here) and me too answers.
Are there any objections/suggestions/improvements? Since support was so strong in the other threads I've edited this version in for now. Remember we can update the FAQ at any time. Community input decides the FAQ, which is what this is already based on.