Thanks for the questions Urgrumag! I’m working on a beginner’s guide to worgen, so every question I answer goes in there. And thanks for answering what you can Harmarth, that allows me to see if I can’t go above and beyond. So here we go!
I do have plenty to add here.
Fire is indeed used as a weapon against worgen in both the Grizzly Hills and in Gilneas. In Escape from Silverbrook[1], Freed Alliance Prisoner says “There’s lamp oil in the back - make use of it. The fiends hate fire!”, and has you throw fire at worgen. In By Blood and Ash[2] in Gilneas, you use cannons, not fire.
It’s true that fire burns. This is seen as well in Curse of the Worgen issue 4, as Halford Ramsey uses a brazier of fire to bring another worgen to a smoldering end.
However, worgen are not afraid of fire. In fact, both Gilnean and Wild worgen use fire as a tool, both in destruction and recreation. Duskwood itself is a great example of this. In Brightwood Grove, we see the Nightbane Pack of feral worgen have built camps, a village, and have added several campfires, torches, and a giant bonfire to light it all.[4] In the comic “Dark Riders”, the very same worgen are lead by a branch of the Wolf Cult as well, and perform rituals in old houses and caves alike. One ritual takes place in Mistmantle Manor, where the worgen used candles.[5] Their headquarters of Roland’s Doom is lit as well,[6] seen even better ingame where Roland’s Doom is well lit inside and out.[7][8]
Furthermore, we even see the worgen of the Gilnean Wolf Cult using fire without fear. Alpha Prime himself has his abode lit with several candles,[9] and Halford Ramsey uses a full campfire while reading.[10]
In the end, fire can be a problem when it’s in your fur. However, while it may be an instinct that comes with the wolf side, there is plenty of worgen lore to say worgen are NOT afraid of fire, and actually use it in their day to day lives.
Cited Sources
[1] https://wow.gamepedia.com/Escape_from_Silverbrook
[2] https://wow.gamepedia.com/By_Blood_and_Ash
[3] https://i.imgur.com/edITEpV.jpg
[4] https://cdn.discordapp.com/attachments/512036763871739925/627681250173255691/unknown.png
[5] https://2.bp.blogspot.com/XckkM-X8iawanoNg-dqJDhREEfxZHpGfwHjnE0vhjf6vGkmPnxrPG--yKd5GfFnXVVIwFLU09Y1k=s1600
[6] https://2.bp.blogspot.com/GEjS37R2et08TEgeEHubD0nXXPwqqhhXSyPalKenWTA8oXxUBejVUEUiLtm8joSUjTzWpWgOQLgC=s1600
[7] https://cdn.discordapp.com/attachments/512036763871739925/627682288003448863/unknown.png
[8] https://cdn.discordapp.com/attachments/512036763871739925/627682339337666601/unknown.png
[9] https://i.imgur.com/qNkIyTw.jpg
[10] https://i.imgur.com/jPzNf5u.png