I had just logged in on my tank when that happened. I came into the dance floor and see nothing but orange names...I was all, WHA???? and then I face planted...no toggles on. I rezzed in the Hospital and promptly toggled on everything and went to tanking...it was a blast, never had that many 'trollers and defenders buffing me!!!
As for the reason why the Devs did it? I would have to guess because they finally got tired of everyone calling them on every time they entered the Pocket D instances...so they took the challange.

I had great fun on that one and earned the title "Choas is eternal" because that is tied to my Taunt.

All in all, everyone there looked to be having fun and kept coming back for more.