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xkcd #2929: Good and Bad Ideas
(imgs.xkcd.com)
Alt text:
While it seemed like a fun prank at the time, I realize my prank fire extinguishers full of leaded gasoline were a mistake.
My beef with the placement of that item is that it isn't even further down the "actually a good idea" axis. Penicillin -- perhaps the most important medical innovation of the 20^th^ century -- rated less "actually good" than mere laser eye surgery and fecal transplants?! C'mon, Randall!