Let's have a little Come to Jesus meeting here. Like the link in the post above, I let that stuff slide. When the conversation continues (and often gets out of hand) is when I step in, delete posts and clean up threads. Use some common sense before you hit the send button. "Is what I am about to post proper for this forum?" And if someone else posts something you don't need to respond. That is what escalates discussions and sends them to trash.