...for our Bible-thumping* friends:
Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen.
And a few bonus scriptures:
But now you must rid yourselves of all such things as these: anger, rage, malice, slander, and filthy language from your lips.
Let us therefore make every effort to do what leads to peace and to mutual edification.
1 Peter 2:1
Therefore, rid yourselves of all malice and all deceit, hypocrisy, envy, and slander of every kind.
How can you who are evil say anything good? For out of the overflow of the heart the mouth speaks.
*Which is not to say that I have anything against reading the Bible or being a Christian. I just think that if you're going to claim the label and (especially) try to force your beliefs and values on others, the least you can do is live up to it. All of it. No cherry-picking, please.