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 
Even the reddit admins themselves tried to back away from this. They eventually realised that people sharing links to reddit posts is not a bad thing, and wanted more of it.
The only reason they continued to crack down on it is that there is a historical cultural legacy that was incorrectly fostered around it on the site.
Also because of things like r/cth posing a problem to them