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 
Why should we care what our culture looks like to others? Most of them are not worth treating with respect or as peers with whom one can have a meaningful conversation. There's no thrill to this. The vast majority of the people we end up tussling with are extremely ignorant. They have nothing new or interesting to say. They don't even really have beliefs or viewpoints most of the time, they're just parroting things they've heard. That's not hunting, that's throwing baseballs at toddlers. They're not arguing with us, they're arguing with half-understood phantasms they couldn't articulate even if they were aware of them. This isn't fun. It's not a challenge. Dogpiling them a hundred deep at least gets them to shut up and log off sometimes.
It was fun for a few days and then I started to remember how profoundly, profoundly ignorant and incurious most liberals are. This is just reddit 2016 all over again, except back then there was at least some novelty in taking the muzzle off. Now the dunks are boring because we're saying the same things to the same liberals who have learned nothing and not changed at all.
Honestly if this is your mentality then I don't get what the point of dunking is at all. Imo, dunking serves two purposes: keeping people on the straight and narrow for good faith discussions, and being fun. If you can't amuse yourself and you can't get people on track, then dunking has become useless and vestigial and should be abandoned altogether.
Personally, I've had tons of fun, like with the bit where I pretended to be shocked about what Hexbears believe and asked someone for "a good source to throw at them." Get better bits.
Imo gaining one comrade is worth any number of libs. We have nothing to fear from libs. There's no reason why they should make us retreat. If we defederate, their ideas will be able to go unchallenged which will allow them to propagate. The fact that most people aren't willing to completely redefine their worldview within a week is hardly surprising.