Their reasoning was any interaction with the sub, even going there to troll or brigade was giving the sub more exposure and thus helping the sub, therefore any interaction with it is bad.

There was one post on a Joe Rogan sub ragging on him for being dead wrong about something and I commented on why it was particularly egregious that he stated something as a fact when the article he cited as reading contradicts what he said and I get a message from a sub that I have never heard of banning me because they apparently ban anyone who even comments on subs they don't like.