In response...

I mentioned this list in the Calvert lounge today. From Catholicity.com:

BUMPER STICKERS SEEN ON THE POPEMOBILE:

"Question Authority. Ask Me Anything."
"Infallibility on Loan from God."
"God REALLY IS My Co-Pilot."
"Honk if You Pray the Rosary."
"Choose ETERNAL Life."
"Speak Softly and Carry a Big Cross"
"All Roads Lead to Rome."
"Say Mass, Not War."
"Give Me Confession or Give me Death."
"I Brake for Souls."
"Meet the New Boss, Same as the Old Boss."
"Bible On Board."
"My Other Car is Also a Popemobile"
"From Poland With Love"
"I'll Never Get to Meet the Pope Because I Am the Pope."
"Livin' the Vida Papa!"
"Hang Up and Pray."
"Sin Happens."
"Make My Day. Kiss My Ring!"
"I'd Rather Be Saying Mass."
"Honor Student in the College of Cardinals"

My favorite is "My other car is also a Popemobile."