I think there are a lot of people (in this forum and many others) that confuse the ideas of criticizing the critic (including insults), criticizing criticism (including dismissal), and counterpointing criticism. First, out of the way, the first one is almost never useful and should be avoided in all cases except perhaps for when the critic has already aimed a shot towards the audience, and even then it's probably best to ignore it and walk away. Chances are your poorly worded insults will change nobody's opinion of a well written article, no matter how many misspellings you make. Your well written insults? Well, those might have a better chance.
Onto the second idea which I am seeing defended multiple times in this forum, I have to disagree that this is useful in most situations either. The only times I could see criticizing the criticism as being beneficial would be if the critic did not look deep enough into an issue, and therefore missed a specific point or idea that could change their general feel of a work, or they focused too much on a less important part of the whole to the detriment of the overall criticism. The problem with this is that all works of art impact each individual in a separate way. One person may be so bothered by what another would consider a trivial point that it ruins the rest of the experience for them. And even if it should be a small part of the whole, if it manages to ruin the whole then it IS an important topic to discuss, so this one becomes very hard to determine whether they have done their jobs in criticizing 'correctly' or not. I also understand that this is the category this post falls under, and that if a person was truly turned off by Shamus' previous articles due to not understanding his points, or strongly disagreeing with his points, that they have every right to dismiss his article as useful, or to feel that some disagreement with his article, even if it was a small disagreement, ruined their ability to enjoy reading his article. Which is where I realize I may be wordily pointing fingers while ignoring the ones currently pointed back at me, but I'm this far so continuing on!
The one that I hope most people falling into one of the other two categories believes they are doing is this last one, counterpointing criticism. But the issue with this is you can't just say "You should have focused on this idea instead of that one" as that falls under the last category. You have to say "I can see your point on the ideas you focused on, however I believe the material is much more enjoyable when you focus on this other aspect, and here's why." Or even "I disagree with your assessment of what you did focus on, as I viewed it this way instead." See how the last idea shows not only that you understood the information given by the original critic, but also built upon it and placed new information into the system? If done correctly, and if the original critic is open to suggestion, nobody will even feel insulted by the end.
Onto the second idea which I am seeing defended multiple times in this forum, I have to disagree that this is useful in most situations either. The only times I could see criticizing the criticism as being beneficial would be if the critic did not look deep enough into an issue, and therefore missed a specific point or idea that could change their general feel of a work, or they focused too much on a less important part of the whole to the detriment of the overall criticism. The problem with this is that all works of art impact each individual in a separate way. One person may be so bothered by what another would consider a trivial point that it ruins the rest of the experience for them. And even if it should be a small part of the whole, if it manages to ruin the whole then it IS an important topic to discuss, so this one becomes very hard to determine whether they have done their jobs in criticizing 'correctly' or not. I also understand that this is the category this post falls under, and that if a person was truly turned off by Shamus' previous articles due to not understanding his points, or strongly disagreeing with his points, that they have every right to dismiss his article as useful, or to feel that some disagreement with his article, even if it was a small disagreement, ruined their ability to enjoy reading his article. Which is where I realize I may be wordily pointing fingers while ignoring the ones currently pointed back at me, but I'm this far so continuing on!
The one that I hope most people falling into one of the other two categories believes they are doing is this last one, counterpointing criticism. But the issue with this is you can't just say "You should have focused on this idea instead of that one" as that falls under the last category. You have to say "I can see your point on the ideas you focused on, however I believe the material is much more enjoyable when you focus on this other aspect, and here's why." Or even "I disagree with your assessment of what you did focus on, as I viewed it this way instead." See how the last idea shows not only that you understood the information given by the original critic, but also built upon it and placed new information into the system? If done correctly, and if the original critic is open to suggestion, nobody will even feel insulted by the end.