Currently we can only mark a transaction as spam if it comes a NFT or a token. This year I have received approx 40+ micro deposits from different wallets which has $0 value to my main Solana address. Some fake spam accounts sent 0.00000001 SOL to my wallet which has no value. Arkam Intel shows these deposits are made from fake accounts. It would be great to have a feature to mark these as spam so that it will be hidden instead of marking as a reward.