Who's in the wrong

[Virtuosos]

Rules also say:
- Please try and follow the “Play Nice Policy” rule set. Players need to use their common sense here and not do unethical things for personal gain. Respect camps, do not train others, don’t kill steal and don’t ninja loot. There will be consequences for these actions as this is strictly a PVE server

you are, in fact, not playing the "play nice policy"....

And here...
".....How you pull the camp is up to you, as long as you are able to engage the mobs very shortly after they are spawned."

4. In order to hold a camp, the player or group must be able to demonstrate the ability to hold the camp without further help.

he has demonstrated he can hold it by himself for an exceedingly long period of time, he is engaging his mob shortly after they spawn (only takes a short minute to zone out and in)

and it says a presence....obviously his presence is felt when he quickly zones in and out, otherwise his camp would of been stolen long before you arrived.

"If there is a full spawn of mobs in a camp room up I think that would be considered not camped"

dont think there is a full spawn of mobs in that camp, so i would consider that...camped?