Funcom has had the same hands-off policy for the official servers since the game was released. They do not often intervene and usually when there is a lot of evidence of players preventing others from getting access from the starting desert spawn points into the rest of the map or getting to bosses that hold part of the keystone required to finish the game. See their post on it:
https://forums.funcom.com/t/harassment-and-griefing-issues/15950
Sorry that’s the reality. If multiple players / clans find this group/individual is spoiling their fun then work together to defeat them.