StreamOfTheSky
Adventurer
Google is your friend. More specifically, James Jacobs post, which is the 18th reply (19th post) on that page (I can't get a link to that post to work right ATM).
Thanks for that link. After reading through, I've actually decided if I ever run an AoW game, I'm totally allowing a Paladin to be immune to infestation.
In particular, these posts really made me look at it differently:
"though 2nd edition, heres the Paladin's Handbook outtake:
Immunity to Disease
A paladin has complete immunity to all forms of organic disease. This immunity includes diseases from rat, otyugh, and neo-otyugh bites, as well as nonlethal but disabling maladies like measles and earaches. A paladin never catches a cold or suffers from tooth decay, and is unaffected by parasitic monsters such as green slime, violet fungi, gas spores, phycomids, and rot grubs. His wounds never become infected.
The process occurs instantly, automatically, and painlessly; the paladin isn't even aware of exposure to a disease."
(yeah, 2E, but that aspect of Paladins doesn't seem to have changed much in RAW, and definitely not in intent)
"Given that on another thread it was noted that the damage reduction of Warlocks and Barbarians would prevent the worms from burrowing, I think were I playing a paladin I'd be a bit upset if I look over and see the barbarian is immune due to his thick hide and hard living, the warlock is immune due to his pacts with creatures that should not be dealt with, and then my own devotion to the ideals of good nets me . . . nothing in this case. I am going to run them as immune to the worms."
So...the worms deal 1 point of damage as they burrow inside, then are destroyed by the paladin's divine immune system. Classes with DR (or hell, even adamantine armor, though I guess the worms could try to attack an area not protected by the armor) would just plain be safe. And I say that having only third person anectdotal experience of AoW till now. I have no idea if ruling like that severely ruins the campaign, but if it does, doesn't sound like a very well-built one to begin with...