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 
we do have the downvote emoji
but it's a comment instead of an actual downvote, meaning you're making your disagreement publicly instead of anonymously and opening the floor to further discussion.
Long ago in the Second Age when I was posting with Elf kings and Dwarf lords and all that shit from 20+ years ago I always preferred to actually post rather than do something like block a person. I never used chat filter, never blocked a person (unless they were spamming in a video game). I liked it that way. I really appreciated that we got rid of the downvotes here. I tend to like upvotes because it feels like a nice way of saying "heard and acknowledged" to a post but I also like to actually reply with a "nice post!" or "that's funny!" because it feels so much more sincere and engaged.
What I'm trying to say is I genuinely appreciate the 'culture' we have fostered here. It's a nice place. If anybody calls us a bunch of meanies I'd say just look at the mutual aid comm or the way the mods politely remind people to tone it down if things start to get genuinely heated or how we are anti-sectarian.
I kind of wish there was like a "Thumbs up" button only for comments replying to your comment so you could agree to someone in way that showed you didn't have anything further to say. I mostly just use
For that, which I guess works well.