Northbound on the 405

Richie spotted it first -- a white sedan with bright pink lettering: "Kiss Jail Goodbye! Lipstick Bail Bonds"

I had a sudden and unusually brilliant idea (for me) ... Why don't we form a Bullhorn Brigade and, using bullhorns purchased at Radio Shack (est. price $25,) when we spot a driver using a cellphone, we put it to our lips and bellow, "Turn that phone off!" or, alternatively, 'Hang up!"
A disembodied voice -- God perhaps? -- telling you to hang up? Priceless