Moderators cant ban Users , only Global Mods and admins as far i know !
Patrollers (at one point, the majority of mods were
patrollers -- moderators of newbies) can ban
Brand New and
Newbie accounts.
Regular mods can ban Newbies if they haven't been whitelisted by another mod, don't have Copper membership (IIRC), and have less than 150 posts or less than 30 posts if they have earned at least 1 merit.