Ok, so let's say you play a game and for whatever, a player takes control and it's clear he's going to win the game. Someone in chat says:
"hey, you shouldn't have done x because then y happened and allowed z to take control"
assume there is at least some grain of truth to what the player is saying even if it's somewhat debatable
I've come across all sorts of reactions when I personally do this, and the top three are listed below. Many times, I'm pointing something out because I'm frustrated that I ultimately lost, but when someone does it to me I'm ALWAYS appreciative of the feedback eventually. My most common reaction is #3.