This is a strange comparison. From what I gather, mempool filtering is a way for node runners that they do not wish to relay transactions that effectively make self-custody more prohibitive (due to they making transactions and the running of nodes more expensive while offering nothing). The other examples are brain-dead governments just abusing power as normal.

And before anyone comes to me with spam drivel, I don't want to hear it. It's a trap people have been forced into - to define spam. What I want to hear is a concise definition of what bitcoin transactions ought to contain. When we got that, everything that isn't enveloped should just not be there.