Funnily enough, I was shadowbanned from the only community in reddit that I was active and cared about (/r/firefox) after respectfully complaining about the redesign in 2 different posts. Maybe there's a threshold of how many times we're allowed to complain over there?

This was my first shadowban and teached me:

a) It's not worth to invest time in these communities.

b) To be shadow-banned is extremely insulting, especially if you didn't engaged in inflammatory or abusive behavior.

c) I will not engage in a community that shadow-ban people even if they have inflammatory or abusive behavior, everyone should, at the very least, understand why they we're banned and learn from it.

Thankfully, nothing of value was lost and now I simply don't care enough about Firefox or Reddit anymore.