Streetwise - a couple of "pearls" from people I have met and for whom I have had a lot of time.
Firstly, never make an enemy of someone you could have made a friend.
Secondly, I once heard a friend from Saudi say to someone who was giving him a hard time that the Arabs have a saying that broadly translates as "lower your voice and strengthen your argument".
Whether you like it or not, this is a community of friends who respect each other for who they are. We don't always agree with each other, and when that happens we say so and make our case - that is the nature of mature debate. But we respect the views of those with whom we disagree. We do so politely, making our case for an alternative point of view and without attacking the personal integrity of the individual, and in doing so we all learn something, whether we are actively participating or not. We remain friends. And surely you would agree that there is more than one way to trade successfully, and what works for you will not necessarily work for someone else, and vice versa.
This is a medium where, in the absence of visual clues, it is very easy to give the wrong impression, when the same thing said in a "face to face" situation would give no offence. likewise, it is too easy to say something to someone on a BB that we would not dream of saying to them directly, and we need to keep that in mind before firing off a broadside.