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 
I totally understand your trepidation. Sometimes people can get a little out of pocket. I myself generally prefer to stick to the hexbear instance and deal with things that come up through that. That being said, as a dedicated old-head of forum posting in general (I have been on different forums here and there since 2007) I have yet to see or be with anything that creates as consistent (and actually relatively insightful) local culture as to the chapo posting method. It's more aggressive than I personally am, but It just works for cultivation purposes. Our posting dominance and the reaction it has had proves it,
Let them react how they will. They are only showing their own ass.