There's a story in Nordic Lore, called Lokasenna (or The Flyting of Loki) where Loki crashes a great feast where all the Gods are attending, and just slanders all of them one by one, even as they rise to each others' defenses, until Thor throws him out. He even slandered Odin, his very Blood Brother.
One way that I read this is that Loki, as a Trickster God, oversees comedy and parody. In his jests, he revealed aspects of the Gods that none of them were willing to admit to each other, even though everything he said was probably true, at least to some degree. That is, after all, one of the functions of comedy that's any good: revealing uncomfortable truths that nobody's willing to address in any other way. Comedy that's not challenging to someone is mediocre, and thus poor comedy.
But another way to read this is that Loki deserved to be thrown out; after all, he basically broke ALL the taboos of guest conduct. (Even killing guards in order to get in). Even if the things he said were partially true, it's likely that he was exaggerating and leaving out key details. He came in and just caused unnecessary trouble for everyone there for no other reason than to troll. Trolling isn't necessary challenging of the status quo; it's just being a jerk for its own sake.