If getting your posts downvoted on an online message board qualifies as "really aweful behavior" then I feel your moral compass is broken. There is way worse going on in this world. Also in the thread you refer to in your initial post you complain alot about people downvoting you. This is to me a very annoying habbit, and one that leads me to downvote any post where you complain about being downvoted, as I feel that kind of complaint doesnt add anything to the discussion.
Then OP is hamstringing themselves. 99.9% people in the world have zero personal investment in your happiness or feelings. A good percentage of that number will not spend the effort to make information emotionally palatable as possible for you. If you decide to only listen to people who are kind and sensitive to total strangers, you are massively limiting your exposure to new, often important information.
The same quality that makes people expert in a field and hence well-worth listening to (devotion to truth + knowledge over feelings and "truthiness") often means they are not the gentlest souls around. Obviously there are exceptions and I certainly am not advocating for being an asshole, but in my experience most of the truly expert people I've met are not very "nice" on an inter-personal level. The Fields Medal winner, the Cabinet member, etc. are typically thinking about their work, not your feelings.
