Let's see.. I put the time, effort and creativity into creating the content and then split it evenly with the guy(s) who comes along soon enough to claim curation rewards? I don't think so. A curation reward is like a finders fee, 25% is plenty to get of my time, effort and creativity.

While I don't agree with those who upvote their own work and rarely, if ever vote on other people's. I think that for the most part, those who upvote their own work, also upvote others so, I really see this as a non-issue. Deal with the abusers and leave others alone.