Whats a good ETH notary service since BTC based OP_RETRUN txns are taboo?

Question

I want to notarize a SHA256 hash of a document I have. Before ETH I would have used a BTC OP_RETURN transaction service. Since BTC is trying to reduce notary spam, what would be a good ETH notary service that people might recommend that the ETH community doesn't frown upon?

• A look at OP_RETURN and whether embedding arbitrary data into Bitcoin’s blockchain is spam