Technical question re: bannings

I noticed a poster who shall remain nameless was recently banned with 2 posts. One of which was a fairly innocuous thread starter in IMHO, the other of which seems to have been lost and may have been the post of infamy.

My question is thus: for a poster to be banned so forthwith, I always assume them to be a previously banned poster attempting a triumphant return to notoriety. Is there some mechanism by which vB notifies the Admin that a banned IP has just re-registered? or is it only after some other behavior catches the attention of someone in charge that the perpetrator is caught?

We prefer that you take questions related to bannings to email. My email is in the profile.

As is mentioned in the FAQ - guidelines for posting at the SDMB. Please read the FAQ threads.