Infractions are a form of punishment for breaking the rules on MCCP. Five infractions equal a ban,although if the infractions obtained were due to minor offences contacting with RFS after a timespan might get the person unbanned.
In the beginning, when you received an infraction, you would have "Rule Violator" as a rank for ten days. Sometimes, this rank would be stuck called a "Frozen Rule Violator". At some point in 2008, Draco revamped the system, taking out the rule violator rank. Users with less than five infractions also received a clean slate. As of today, infractions now never expire.