It is true that many "mistakes" are not that noticeable to a casual observer - but if it bothers the maker and is a comparatively easy "fix" - why not encourage the fix more often?
Simple really. Not my quilt, not my problem. If it bothers YOU, deal with it. You don't need MY permission either way.
I feel that if someone asks, they deserve an honest answer. But it seems like others think that isn't being supportive so if I don't know and if I don't know the person asking well, I usually just refrain from answering.
And this. People can get really nasty if they don't like an honest opinion. I've seen it here and elsewhere.