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 
yeah it's an interesting psychosocial phenomena. externalization of dissent into an Other of some sort, necessitating a constant redefinition of the self to preserve power structures. We see it with class, race, sex/gender, sexuality, basically any intersection you could think of.