What I meant,
Lush, was that some of the broken taboos in LotR lead to "not funny" stuff, and others lead to "not ambiguous" stuff. Some lead to both. None lead to neither (sorry about the triple negatives there). So between the two parts of your assertion, I say "yes, that's true".
But what about
The Hobbit, or doesn't that qualify as Tolkien?
Bilbo tries to swipe Bill the Troll's wallet (at least I think it was Bill), and that sure as heck was funny. More Trickstery too, don't you think?