Agamon
Adventurer
It's tattooed into the elephant. It's tattooed into the giraffe. It's tattooed into the "Keep on the African Savannah" adventure. It's tattooed into the fact that Elephavania and Giraffistan are next to each other on the map that came in the DMG. It's tattooed in the Elephantbane Blade whose lore specifies that it lies in the disputed territory on the border.
Honestly, look at any thread complaining about 4e lore or Planescape lore. Look at the post above where Hussar said it was a PITA to say no all the time.
It is a thing that happens all the time.
You have your anecdotal evidence, I have mine.
I guess the point to this whole debate is that some people read an RPG book like it's a MtG card and what's written is gospel, and some see it more as a malleable suggestion.
Take my own players, for example. They don't think the book runs the game. I do, with their input. We made PCs the other night for an FR game I'm starting. One guy asked if he was allowed to be a gnome. No assumption, even though he knew there were gnomes in FR. And after I told them that the setting is very anti-drow and anti-orc, one player said, "Well, what about this..." and we discussed how he might make a drow and make it work and it turned into a basis for the group template.
I might be lucky to have such players, but I'm in 4 separate groups where I'm the only similar person in each, and there isn't a player out of the 15 that would have trouble with this. Small sample size, maybe, but from my point of view, it doesn't seem like such a big problem.
And maybe I have rose-colored glasses on, but I think they'll do a good job making this kind of stuff easily ignorable. In the playtest, alignment is nothing more than 9 descriptive paragraphs and the game isn't hurt by "black markering" the entire section. Nothing invasive in the mechanics, which is what I mean by "tattooed". I can call the Sword of Kas whatever I want in my game, it's not going to mess with the actual game.