Thanks for the post! I definitely agree with the basic premise.
On the other hand, the problem may end up being solved simply as a side-effect of the Gridcoin 4.0 Roadmap proposals, particularly TCD and manual claim rewards. These two mechanisms would give users much greater control over their magnitude and payouts. The current greylist/whitelist proposals are also relevant. Perhaps one could do an analysis to see whether these roadmap + greylist/whitelist proposals are sufficient by themselves to eliminate the problem.