English

So is there a system in place to help mitigate the actions of a few players utilizing pvp tactics in non pvp zones? Is there a graduated set of consequences for repeat offenders?

Yes

All reported incidences with credible evidence are investigated and behavior profiles are complied against players accounts. A series of warnings are given to repeat offenders before more serious sanctions are applied and none of theses warnings or sanctions are made public knowledge and never will be.
The same applies to guilds but typically it is the behavior of a few players that gives guilds bad reputations.

Unfortunately there are always players that will play right on the limits of rules old and new, and most volunteers find the task of regulating behavior distasteful and not really what they signed up for.