Can you imagine how boring things would be if we all agreed on everything?
I encourage open discussions. It is how we all learn.
That being said DIYing isn't an angry debate, even when we disagree.
When a member asks a question, the odds are very good that there will be a wide range of answers, some of which may be the complete opposite of what you believe. When we see a post (in the responses) that we don't agree with, it is not up to us to prove why their response is right or wrong, or why we think our response it better. Doing so will only confuse the original point of the discussion. Sometimes there is no right or wrong answer. It is up to the original poster to determine which response makes the most sense to them.