This one is hilarious. Miners validate blocks. What (non-mining) nodes do is irrelevant. A miner is *incentivized* to validate a block so it knows that it's building upon a valid block. This is actually how Nakamoto Consensus works. *Miners* (not non-mining nodes) indicate their acceptance of a block by building upon it. This CryptoMedication guy must have started reading about Bitcoin last week, since he/she clearly has no idea. Fail #3.