It's a school for those aspiring to be an annoying [censored].
Tons of famous decoys have graduated from there, ever hear of Admiral Yamamoto, Bill Cassidy, Tom Hanks, Tom Cruise or Justin Bieber?
Well none of them are decoys but if they were they'd probably become experts via How to be an annoying [censored] 101.
(Actually I'm pretty sure Bieber is alumini)