Well if we are opening the forum to that...
At first I was feeling the same as
lmp, I think my initial reaction was that it would take away the enjoyment of the game from being able to spot a wolf from an innocent villager. I mean I was thinking what would the game turn out to be like if the villagers all sent out coded messages of their innocence, then to me it would make it less enjoyable, because it would take away from the guessing and more or less randomness.
Then after a little discussion with morm and some time I realized:
1) You have to spot the anagram. Even if I went out looking for them I wouldn't be able to find them, I'm never good at coded/secret messaged, I'm far more blatant if you can't tell. Like hit you in the face blatant

.
2) Then you have to believe it and it's not a wolf masking itself so to say.
So when I thought about it, it didn't take away from the nature of the game, the nature of guessing. Because, you have to believe it and I would hold wolfish voting behaviour, or other signs of lycanthropy over any secret message (if I could find one).