It’s a fair point, “meta bad” is poor discourse. The most prevalent concern I’ve seen is that allowing federation to Meta is setting the stage for another Gtalk-XMPP style conflict.
In effect, when a party has such a disproportionate user base, they can use that to dictate terms on the evolution of the protocols that underpin a platform.
Here’s a write up by someone who worked on XMPP and Gtalk who puts it much better than I could. Article
See I’m sure that’s some of what I’m remembering, but at least when I played Klingon about 2007 it didn’t seem to be the same game.
(Btw, the Acti Zork games are acted DVD graphical adventures, unlike their text based precursors. Worth a go if you can. )