Here's some data to add to this:
Troll SK, Inny worshipper. I have been working the factions fairly intensively with the following quests:
Lizard Meat
http://everquest.allakhazam.com/db/quest.html?quest=285
Factions Raised:
+ Clurg
+ Green Blood Knights
Factions Lowered:
- Shadowknights of Night Keep
- Storm Guard
I am now:
apprehensive to Ogre shadowknights
kindly to all guards inside Oggok
dubious to every merchant, except the two on except Clurg faction (kindly)
It took about 300 lizard meats to get out of dubious (SK guild)
It took about 40 lizard tails to get from dubious to kindly (guards)
Zero movement on the merchants.