adaliabooks: Of course, no one is going to actually claim a werewolf role... unless they are a Tanner (or Minion, if I understand correctly)
You forgot gogtrial's claim of villager.
Somebody may end up claiming werewolf if they know/think they've been swapped.
For example, if HSL says he swapped...I dunno, Trent and Drealmer, if Drealmer was a werewolf while Trent was a villager, Drealmer may pipe up and say "I was a werewolf! Get Trent and the game ends!", to which HSL says "Nah, just kidding, I didn't swap you two." whereupon we lynch Drealmer.
Only other time I've seen it happen is if the werewolves somehow gain control of the game (so of course everybody wants to claim they're on the werewolf team), but I don't think that's possible in anything over 5 players.