I have "Wanted Dead or Alive" in my Red Dead custom soundtrack mix.
The paper map that comes with game shows you where animal regions are. But not bunnies.
If a posse is harassing you, leave their area or leave the game and find a new one. XBL's GT rating and avoiding is still there to use.
Crouch walking works well in Free Roam as well, sneaking up on bounties such. Your posse will see you regardless, though.
Hardcore gametypes will be interesting.