Warnings are kept in the J2O Admins and JCF Admins/Mods forums in a thread. JCF warnings are removed as needed; J2O warnings are removed at a rate of one per month (i.e. if someone gets two warnings at once but does nothing after that, one will expire after a month, and the next will expire a month after that one.) I prefer the latter system, but the JCF administration likes this one. That's pretty much how it works.