Contradiction on Wiki for Halas Gnoll Fangs

[Tobius]

http://wiki.project1999.com/Wolves_of_the_North
Says:
"Turning in Blackburrow Gnoll Fangs to Lysbith McNaff is the normal way to raise faction with the Wolves of the North, but at the cost of Rogue faction."
http://wiki.project1999.com/Rogues_of_the_White_Rose
Yet on the Rogues page it doesn't show that as one of the quests which will lower faction.
On the gnoll bounty page itself there are no negative factions listed.
http://wiki.project1999.com/Gnoll_Bounty

Can anyone who has ever handed in a gnoll fang to barbs confirm?

Thanks,

Tobius