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 
It's also one of the few pillars of counterculture within its sphere, which is why I think it's important that we don't squander whatever potential it may have.
False consciousness has to be deconstructed wherever possible. We must never stop explaining
As much as I understand the want for a safe place to hang out, as much as I personally enjoy being able to let my guard down when I'm on here, this kind of stuff is about as close as you can get to important when it comes to social media.
I'm very proud of the comrades who've gone to tremendous lengths to engage these people in good faith. Doing so serves multiple purposes: either convincing the person to think differently, or convincing readers to think differently, or if nothing else casting a shadow of doubt on readers' confidence in red scare propaganda and mischaracterizations of communists.
In the lemm.ee meta thread there was an obstinant fuck that refused to engage in good faith (turned out he was a landlord, go figure), but the users engaging him with well-sourced claims and counterclaims elevate people's perceptions of leftism in general. It wasn't for him, it was for the average working class liberals reading the hot new drama.