I think how people got the word illiterate to call a person who doesn't use those incorrect words and doesn't post 14 times to explain how they got to the creek to take a drink is from the secondary meaning of illiterate. Illiterate can also mean ignorance in a certain language, or poorly educated in literacy.
What's funny is that these guys are easily offended. It's like they are part of a cult. You can say something like "lol wolfspeak" and they will go on a lecture on how illiterate you are and they are better than you because their dark colored wolf is a hyper-realistic pixel pile, when they haven't even seen your roleplay posts. It's like they think them and their group are the only "literate" players in the game, which is very close minded/arrogant of themselves.
On another thought, I saw wolfspeak on Animal Jam the last time I went on there. Wolfspeak is the new yoloswag now it seems.