Yeah, if you want to abdicate the ability to run a full node. Pruned nodes are not sources of truth.
I have looked at the code Tidwell is not accounting for full nodes, only pruned nodes when talking about smaller blocks with more transactions.
This is the same logic behind "Give them a safe place to shoot heroin instead of on the street."
Not only will they not shoot heroin where you tell them to but, it just makes them use more heroin than they otherwise would.
Tidwell is a smart guy, I just don't think he is being circumspect about the fact that spam is not about incentives. It is about being a dissident and making your mark where people don't want you to.