Second, people may be withholding their code precisely because they fear being laughed at. It's hard to be a newbie! So if you offer a helpful answer that is bracketed by criticism, it is tremendously discouraging. I'd like to suggest to you that if you (or others) do choose to offer unsolicited advice on other parts of their code, that you do so with x-treme kindliness.
However, I must also say that I find your writeups generally chock full of information I can use! It is much appreciated.