Technically we *can't* see the envoys until we die, and when we come back to life we can't see the envoys until we are Wei No Su - Closer to the Stars.
The 'creep' factor seems to have been turned up a notch in Factions. For a relative comparison, look at the ranger spirits and the ritualist ones. Or how about some of the city quests, where you're asked to find out what's happening to
missing bodies? And that one quest where a little girl is taken from her father as payment for a debt?!
Some of the NPC conversations also seem to mistake the 'creep factor' for 'flavor.' In Kurzick territory there is a 'chef' collector whose dialogie is, at best,
mildly disturbing. Here's the GuildWiki link, if you're curious:
http://gw.gamewikis.org/wiki/Chef_Armand