[akinalci]

Did you read the article? It's not really about manipulating other people. It's more a list of basic social graces that some people learn on their own or from their parents, but others need to be taught explicitly.

It's just like anything else; some people can tackle new subjects completely on their own, but almost everybody benefits from good advice. Why should advice on getting along well with others be withheld?

I don't think anybody intends to be a bore or a jerk, yet obviously some people are. It affects their lives profoundly, and they may lead lonely lives. Withholding advice on how they could be more likable, if they're so inclined, seems a little cruel. If you'd use the same advice to manipulate people, that's on you.