WP:WikiBullying to empower bullying
I'm not accustomed to Wikipedia rules, so my comment might be irrelevant. If an editor makes edits to damage an article, it's more like vandalism than bullying. It is bulling only if he damages the article because of it's author. (if he follows another editor to undo him)
I doubt in Wikipedia one can forbid everybody else to edit "his" section of an article. I think that, for a controversial section, comments like "don't delete this section" should be in the form of "don't delete this section, see talk page" and arguments for that section on talk page.