When the block size limit was replaced for the block weight limit (and therefore de facto increased from 1MB to 4MB worst case), the general consensus seemed to be that that was acceptable. And if you're running a Segwit-compatible node, I'd say that is in fact what you opted in to. If you think increasing the block size/weight limit was a mistake (not an unreasonanle position imo) I'd say the solution is to decrease it altogether. (Or maybe run a pre-Segwit node...) But let's leave that aside, at least for a moment? You blame the spammers and these miners for the centralizing effect on mining. Fair enough. But the spammers probably don't care, and these miners even benefit. So what does blaming them solve? (Or is that maybe beside the point; are you not interested in finding a solution for this?)