Yeah for awhile they were talking about comments being a separate pool. I am pulling these numbers out of the air but say comments were 20% of the total rewards, and posts 80%. If this comment draining activity is done at least it would stop at 20% of the total reward pool.
They were actually planning on implementing this at one point and Dan Larmier brought it up, but eventually it was shot down by the community.
I'm thinking it might not stop the current problem, but it would at least limit the overall damage it can do.