And we shouldn't allow this concept to go unchallenged here on Lemmy.
Commenting on an active post is not brigading
Posting a link to something is not brigading
Commenting on something you were linked to is not brigading
The only thing that might be brigading, but isn't because it isn't a real thing, is someone explicitly going, "Hey everyone, go here and harass this person"
It's all fine and good that we have some new rules to keep the peace with other instances but we must fight against 
This might sound a little
but in highschool my history class had a facebook group for discussing the politics that came up from the readings and discussions for us to turn into essay bits and junk. We had a conservative weenie in there and while I was very far from being a raging communist or even a socialist the both of us got into it about healthcare laws and other bullshit which eventually just turned into me berating him for just straight up lying about the laws and policies, the fact that he read the entire obamacare law (LOL). Everyone fucking hated all of his shit I got so much praise from everyone in that group, including my future girlfriend. The only time debate was ever tangibly good for me.
That brings back memories of how one of my poli-sci classes back in college usually ended up with me shouting down some reactionary while the professor just did nothing. And I was just a tepid sucdem who read Matt Taibi's tripe back then too lmao.