I know!
"Nuke their ass and take their ga…
Ow! Arggh! Okay, I get it. I’m outnumbered!!
2 of my faves -
“Honk if you’re illiterate”
and (kinda regional),
“Honk if I’m an Aggie!”
“Horn not working - watch for finger” (saw this one)
“Ted Kennedy’s car has killed more people than my gun.”
One my brother saw about thirty years ago, and I’m still trying to figure it out:
“Why commit suicide when you can go bowling?”
“My Goddess can beat up your God!”
“I’m the PAGAN Jesus warned you about!”
"If the Rapture’s today, we’ll be rid of the Christians! 
"