Spawn camping.

[Orocora1]

Is spawn camping a player that has Warmode toggled on, a challenge that invites PVP, a bannable offense? I was looking over the Griefing guidelines and I don't see a rule that is against this practice.

Griefing refers to the act of intentionally ruining the experience of another player beyond the normal gameplay loop. To ensure the game remains enjoyable for players of all different levels and types, we have forbidden a handful of behaviors:
Farming quest givers, flight masters, important quest objectives, or otherwise important NPC's for long periods of time and blocking other players from accepting or turning in quests.
Impeding a player by following them around and tagging mobs they need to kill for a quest.
Kiting a group of mobs into another player's (AoE) spells in order to kill them.
Interfering with any player trying to complete The Balance of Light and Dark or the Stave of the Ancients quest chain.
Dropping infernals and doomguards on a group of players in low level zones.
Killing a mob that a hunter is actively in the process of taming.

[Uggerbugger]

It is a banable offense as part of "Griefing refers to the act of intentionally ruining the experience of another player beyond the normal gameplay loop". And the bottom of the rules page which says rules are up to game master interpretation.

Yes you can kill a player a couple of times, no you may not follow them for hours and days.

That being said, I assume you would get a warning to stop from a GM first, and if you ignore that.. well then common sense just happens.

[Mauden]

Even though it's not listed in the rules, and war mode is a choice people make with this being a possibility, you will be threatened with bans for doing it. Even if you're camping a prolific camper, it's a no-no.

It's frankly absurd, but it is how it is.

[Creolar]

Being nasty is a part of the game, quit whining. You can't apply heavy hand of the law to every little aspect of people's relationships, or at least you better not.