No, I don't see Mani in the role. To be village idiot it is not enough to a fruit-cake you also have to be loveable to some degree. And while Mani fully fulfils the first requirement his nasty attitude towards homosexuals and divorcees and such disqualifies him on the second count.
I'd like to nominate Puddintane who, in happyred's discussion about evolution, asked the question "If we evolved from apes why are there still apes around?".
In many years of studying and discussing evolution I have heard some pretty daft questions on the subject but I think that beats them all in fatuity.
Of course, I don't know whether he/she fulfils the second requirement but we've had no evidence to the contrary yet.