Make the bytes free, and the accounts cost resources. Resources can be: - time (come back tomorrow and next week to click this button and the account is yours

Make the bytes free, and the accounts cost resources. Resources can be: - time (come back tomorrow and next week to click this button and the account is yours) - effort (captcha like, or maybe even better some time at meta-moderation: Is this a good answer?) - monetary In any case, if accounts are no longer free then having an account in good standing will be worth something. Then, next time mods ban anyone it means there is a cost for them before they come back.