Okay I don't have any Idea what Lucy N Jersey's answer means, but I can tell you that it doesn't make sense because you haven't said what the one is referring to. You should try saying "A shame on one person, is a shame on everyone." although the sentence still doesn't sound quite right but makes a little more sense
It is not correct to say that. The phrase is grammatically wrong as first the sentence with a vowel and then it's followed by a consonant. Another reason is that the word "shame" cannot be counted in that referring to it as "a shame" is wrong.