Never say can't.
For example we were proposing two reward pools awhile back. If we did one for comments and one for posts then these comment thieves might be able to drain that pool, without impacting the posting pool. Now if the comment pool was say 20% and the posting pool was 80% (just made these numbers up, don't set them in stone) then it would act as a stop gap and at least only 20% of the actual total reward potential across both pools would be compromised.
But still they would be able to just post and upvote their own posts. Or make alt accounts and upvote their posts?
Sure but up voting their own posts is not the problem. The new problem is people posting any number of comments... often total spam and up voting their comment 100%. Sometimes not even bothering to up vote the post they commented on.
They can do this rapidly and have all of their rewards and the reward pool focused exclusively on themselves.
If there were two pools then the most they could take from would be the comment pool. It wouldn't effect the posts as well. Right now they are all in the same pool so it is draining that for everyone and even the posts themselves.
Oh ok that makes sense