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 
Reddit, the site that's designed to have as many eyes as possible look at as wide a variety of posts as possible to bring about engagement has rules against the wrong people engaging.
Rule #1: do not be a communist
Pretty much. And don't upvote the wrong things. And definitely don't fuck up their idea of how the algo should work because you post too much.