I came across this interesting bit of wisdom from a wise man, once quite revered by his fellow citizens.
================================================================


Socrates had the reputation of being a great sage. One day someone came to visit him and said:

Do you know what I just heard from your friend? - Wait a moment, Socrates replied, before you tell me, I would like to make you a test, the one with the three sieves. - The three sieves?

- Before telling something about others, it is good to take the time to filter what you want to say. The first sieve is that of truth. Have you verified that what you are going to tell me is true?

- No, I just found out ...

- Very well. So you don't know if it's true. Let's continue with the second sieve, that of goodness. Is that something good you want to tell me about my friend?

- Oh no, on the contrary! - So you want to tell me bad things about him and you don't even know if they're true. Perhaps you can still pass the test, the third sieve remains, the utility one. Does it help me to know what this friend would have done?

- Not really.

.- So, Socrates concluded, what you wanted to tell me is not true, nor good, nor useful. So why did you want to tell me?

They should have this included in the Terms & Conditions over on Facebook.