I remember coming across a site a few years ago, whose owner would kick out anyone who posted without proper grammar or spelling. To preserve the word I think there also needs to be some form of enforcement.
The tools you use affect the way you think. You can do a lot with positive reinforcement as opposed to enforcement!
What positive reinforcement does Lyra offer?
The reward of seeing a nicely-formatted message which you wrote, and the reward of seeing replies to it which are obviously valued by the platform (as opposed to subsumed under a torrent of irrelevant notifications).