Altadenans are already out there picking up the trash that is dumped. This way it is a bit more rewarding and less depressing.
Print the cards.
Assemble gear: trash bag or bucket, protective gloves, grabbing stick.
Gather a group and head to Altadena.
pick up trash around the streets and trail heads (do not enter private property without permission).
Drop trash in appropriate bin.
Prize for the winner could be a coffee or maybe a merit badge (pictured).
Some have used take-out chopsticks as disposable trash pickers.