Matt Groening had some T-SHirts for the LA Riot in his column Life in Hell.
The better ones included:
My other car is on Fire.
Thank you for not killing me.
My parents benefited from a 60's style welfare program
and all i got was this lousy T Shirt.
I used to love LA.
A few of us were discussing possible bumper stickers.
Honk, if you want to be dragged out of your car and beaten.
LA, Its a riot.
That's not smog, that's your house.
               (
geocities.com/hanson_c)