When new users post for the first time on Steemit, I will give them a vote and reply with a comment warning them against spamming the Steem blockchain with unnecessary content. The intent is to proactively warn users and encourage them to be good Steemians.
This is the message they will receive:
Welcome! Willkommen! Bienvenido!
Congratulations on making your very first post on Steemit, enjoy a free vote!
This is an automated comment to warn you if you are considering spamming the Steem blockchain. Please do not make repeated posts or comments and post only meaningful content. Blockchain space is a valuable commodity and it will be protected.
Thank you, and again, welcome!