I encourage people to feel free to disagree, but not be disagreeable. For example, say I see something in ALL CAPS. It would be counter-productive for me to say "Using all caps is stupid". The person who wrote all caps should be able to handle me saying "When I see all caps, I feel someone is yelling at me and I shut down" without starting a flame war.
However, if all someone ever does is disagree, I would encourage others to tune them out. Negative people are toxic.
For further actions, you may consider blocking this person and/or reporting abuse
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I encourage people to feel free to disagree, but not be disagreeable. For example, say I see something in ALL CAPS. It would be counter-productive for me to say "Using all caps is stupid". The person who wrote all caps should be able to handle me saying "When I see all caps, I feel someone is yelling at me and I shut down" without starting a flame war.
However, if all someone ever does is disagree, I would encourage others to tune them out. Negative people are toxic.