This is a really good measure that will reduce the abuse of your Testnet; I don't know what the point of them draining the Testnet Bitcoin faucet is. Do they think these are real bitcoins on the main networks? lol

I will add that most campaigns and bounties do not accept Brand New and Newbie accounts because they can participate with these alternative accounts and cheat using these new accounts with no activities or contributions. I agree with the previous members; there is no benefit in tagging their accounts, as this will not be a deterrent for them to repeat their previous actions.