The greatest and worst method evARR!!!

class String
    def random_caps
        letters = self.split("")
        letters.length.times do |n|
            letters[n] = letters[n].upcase if rand(4) == 0
        end
        letters.join("")
    end
end

created after total boredom.

discuss uses, etc.

randomCase = mapM (if unsafePerformIO (randomR (0,4)) == 0 then toUpper else id)