Someone Surely Has
All Hail Eris #237: Why has no one invented a crap-a-pult for catshit?
My immediate thought was, someone surely has.
SO, I googled goose-goose-ducked on "cat shit catapult" and got a remarkable number or returns.
First two results, both YouTube:
Poop Catapult
http://youtu.be/Sv34bye6xxI
Poop: I INVENTED A TURD CATAPULT
http://youtu.be/KyhUENxDl_o
Note: I did not follow either link.