Mr. Brady, I am sure that you have discovered that not all of life's lessons are learned easily, or without discomfort. Young Mr. Kasra made a decision, without any inquiry, on his part, as to whether something could be worked out. To his credit, he posted before the end of the auction, of his decision that he would not fulfill his bid. That decision, however, is not without consequences. The consequences of his decision are that I have posted negative feedback. I did not judge the young man, only stated that he has demonstrated that he lacked integrity, with respect to this business transaction. If Mr. Kasra is old enough to 'play' on the internet, and old enough to bid on an item, then he is old enough to receive negative feedback for his decision to renege on his bid. That is a proportional response. I can think of no better way to learn the value of honour, than to pay the price for failing to be honourable. As RichPA stated, Kasra has NOT been banned, even though it has been suggested to me that I do so.
As for controlling the speech of others, I didn't do that to them, as I have not done so, to you.