Some criticism is valuable, but some of it isn't. Criticism in the true sense of the word ought to be totally factual and unemotional, but a lot of the time it's just used as an excuse for being insulting or provocative. How is starting a thread saying "this community/device/platform sucks" valuable? How is accusing the entire forum of being "fanbois" valuable? How is implying that a device or platform is "garbage" valuable?