I talked with a GM yesterday. 1 on 1 through tells.

early pulling is not an offense.
there is no declaration defining an early puller.
grieving tactics is a bannable offense.
someone disrupting hunts multiple times can be seen as grieving. if enough people report the same person that person may receive a penalty.
however people using third party applications such as Pos software and Guildwork app is a direct violation and could result in a permanent ban