You have been doing it for some years and I notice that a few posters have justifiably complained about you Unfortunately you haven' taken notice and modified your behaviour
Yes, I have on occasion been unsparingly critical of individuals (or much more often, ideas) that I believed deserving of criticism. In each case (such as my comments about Dan Margulis' views on color management or his inverted K-channel sharpening mask technique) you'll find that my criticism was based on the merits of the arguments presented or results of the method, and not mere ad hominem
mudslinging. There is such a thing as a stupid idea, and there is even such a thing as a stupid question. There are also stupid people. Ignorance is forgivable, as it is where we all start out, but once one has been given the means to rectify their ignorance and persist in foolishness, they have crossed the line into stupidity.
Some people are uncomfortable with my plain-spokenness, and others appreciate my willingness to call a spade a spade, even if it isn't politically correct. I get far more fan mail than hate mail, but even if that was not the case, I probably would not change. And I'm certainly not going to apologize.
I noticed that BruceHouston was more critical of you and didn't get a rebuke
You jumped into this discussion making a throwaway ad hominem
comment that had no basis in the relative merits of the methods. Unlike Bruce Houston's comment, which indicated potential negative effects of the method and how to avoid them, your comment was a straight-up personal attack. It's the difference between constructive criticism (or pointing out a limitation) vs. a personal attack.