There’s a difference between a follower and someone who’s active. By saying not to hail them and to join them, he’s saying don’t just be a follower, be an active member. Basically don’t be someone they’re going to be controlling (if what they want happens), be one of the controllers.
It is, but I thought I just explained to you what it is. It’s the different between a follower and a leader. The difference between the ruled and the ruler. Except in this case, there’s a bunch of Mezin who are in the ruling position. The idea is, why not join them and be one of the rulers instead of one of the ruled.