Someone with poor table manners is usually perceived [rightly or wrongly ] as uncouth, sloppy and/or selfish and careless in other areas of life. Poor table manners can be a WORSTfirst impression.having good table manners is extremely important because it not only shows that you are offering other people respect, but it also shows that you are a respectable person yourself. some people don't expect much of others' table manners, whereas different people may take them quite seriously and consider it a turnoff if you don't pay attention to that etiquette. ultimately it is up to you to use table manners or not, but remember that it shows respect, which will earn you respect in return. Rather than having to be disputed at the dinner table.