It's only insulting and offensive if someone takes it as such, since context affects the semantics. A close friend being like "Hey [name omitted], how you been you sick son-of-a-bitch?", is it still abuse?
Edit: Come to think of it, your use of the word for the title was as a verb. Past tense for a verb adds -ed, while adding -ed to a noun turns it into an adjective. A past tense noun is as it was in the present.