Here in Old Wyoming, I never see any funny ones, just stuff like:

I (heart) My 30.06
I Voted for Bush! (the first)
I Didn't Vote for BillyBoy!
This Aborted Baby Won't Keep His Mom Awake at Night
Kill Bambi--She Tastes Good!
Matt Shephard Sucked!
(Yes, I have seen all of these here in Small Town Wyoming, and worse.......)

Smetimes Wyoming is not a fun place to be, esp. for a Liberal/Feminist/Gun Hater who is married to a cop.....(who is also actually more Liberal than he would like to admit!)