Infractions are warnings/points that are used by the staff for disciplinary action. The forum has rules, and if they are broken you get warned then if it continues an infraction, and many infractions lead to bans.
Infractions look like this x / y (z)...
x means the number of infractions one has currently, an infraction that hasn't expired
y means the total number of infractions of someone
z means the number of points one currently has
For more info please contact me or any member of the global staff in PM.