Art, I used to critique a cutting when I saw something I didn't like, or, had a suggestion on improving the item. It caused more problems then it was worth, and I had people sending me mean messages telling me to keep my ideas to myself and asking, why I thought I knew it all. Now I hardly comment, other than to say nice work or good work, something along that line. People will tell you they want honest opinions, but, when you give honest opinions they're not appreciated. Especially, if your honest opinion is opposite to what others have posted. Like has been stated, if you want an honest and good critique it's best that you ask for one when posting the piece. At least then, the person who gives the negative/constructive posting shouldn't be looked down upon for giving the negative/constructive post, but, that's not what happens.
Len