There have been some real idiots that got made.

My vote for dumbest mob guy has to be Lefty Guns Ruggiero. Have you read Donnie Brasco? He was in Milwaukee and thought Lake Michigan was the Atlantic Ocean. He was wise in the way of the streets, but completely lacking in general knowledge, a common thread among some of the old gangsters.

Valachi did not know where Omaha was (not that Omaha generally matters).

I need to think about some of the dumbest crimes committed. I know a few wiseguys shot themselves and did other stupid things.