For many people, the anonymity of the Internet removes the social restraints they have, and thus they fail to exercise self control. Even an otherwise reserved individual may say and do things that would seem out of character for them. Additionally, the lack of things like voice, tone, inflection, and body language in typed text further confuses things, particularly for someone who relies on obvious cues. I try to give people the benefit of the doubt, particularly here. Anyone can have a bad day, or be unaware of certain unwritten rules, standards, or acronyms; not posting in all caps may seem obvious, but there are people who don't know this. How do you make friends here? The answer is this: don't assume other people mean bad, and don't say or do something you wouldn't do in a face-to-face 1 on 1 conversation.
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Heart of the guardian, way of the warden, path of the exile.