In real life, I was taught when looking at someones work start with praise end with praise and put what needs to be said in the middle - people are more likely to listen. I love honest feedback on my work and have some commentors who will speak up and say what could be improved. I have done this on other peoples work to be thanked by the person but jumped on by their friends makes me hesitant to do it more often. I would say go for it and welcome you to my gallery lol I am a thick skinned Aussie and not easily upset in fact it is from critiques that I have learned what I have :o)

Handle every stressful situation like a dog.
If you can't eat it or play with it,
Pee on it and walk away