Being polite helps. Like SnowSultan, when I see something in an image that could be improved, I leave a suggestion on how to improve it, mixed with remarks about the things I do like. And like SnowSultan, I've never been accused of trolling, and I've received IM's thanking me for a suggestion. Most of the comments on my images are "great", "awesome" and more like that. A few have been left by trolls. But the rarest type is constructive criticism. And I'd love to see more constructive criticism - how else am I going to learn?

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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