I'm not a fan of prefabricated sentiments or canned cleverness. If you're going to be clever, make up your own snappy sayings.
I started to hate bumperstickers when anti-war protestors sported this one: War is bad for children and other living things. This statement manages to be both sanctimonious and smarmy. For "war" you could sustitute pollution, smoking, transfats, or any other damn thing.
I was driving behind some idiot whose bumper sticker read: Somewhere in Texas a village is missing an idiot.
Well, someone in Delaware is not missing a very stupid driver.
Then there's the ever popular
Bush lied, people died.
By the way, I don't care for Nuke the whales,My other car is a Mercedes, or--I could go on, but what's the point?