Reply #55: That's absolutely correct, according to the published rules.

[Ignis]

Do not "stalk" another member from one discussion thread to another. Do not follow someone into another thread to try to continue a disagreement you had elsewhere. Do not talk negatively about an individual in a thread where they are not participating. Do not post messages with the purpose of "calling out" another member or picking a fight with another member. Do not use your signature line to draw negative attention to another member of the board.

You are permitted to post polite behavioral corrections to other members of the message board, in direct response to specific instances of incivility, provided that your comments are narrowly focused on the behavior. But you are not permitted to make broad statements about another person's behavior in general, and you are not permitted to post repeated reminders about another person's mistakes.

You are permitted to criticize public figures, who are not protected under our rules against personal attacks. However, if a public figure is a member of our community, that person is protected by our rules and you are not permitted to personally attack that person. (You are permitted to offer constructive criticism of their activities as a public figure.)

-- http://www.democraticunderground.com/forums/rules_detailed.html

That's only the published DU rules, though. Perhaps other factors are in play? :shrug: