I'm on ladder for more than 5 months now, and I rememer an occasion were I was out triping with friends, when I get back the Ladder had 2 resets, and I received tokens for both, without even logging in on the game.
Just now the high lvl Ladder (2000 and 2100) it's only with my guildmates (The Evil Dead), it's against the rules? Of course not, they all want to play the Ladder, but if someone from another guild wants to join he will have 9 targets on his back. So, what can we do about it? Punish my guildmates from joining on the Ladder, what is not wrong? Punish player on those ranges for not joining the Ladder, even having 9 targets on his back? No one is wrong about this.
What the Ladders need is new items, so more people will want the Tokens = More people joining.
And I really the idea of 'no opt-in', everyone will be on ladder, wanting it or not.
Make the arena the same then, no limit on the number of guild members joining...