I watched a documentary featuring Sylvester McCoy, the actor who portrayed the Seventh Doctor on Doctor Who. He was speaking about his first encounter with Doctor Who fandom. He had been invited to a convention and was asked to sit in on a question-and-answer forum. One of the fans asked him about something he'd done in his third incarnation. Thinking quickly, McCoy (who has a long history in vaudeville and standup comedy) did an amusing impromptu impersonation of Jon Pertwee (who played the third doctor). But the fan didn't mean it as a joke. He was quite serious, and seemed very confused at McCoy's response.

I'm not sure how that sort of a question should be answered, though to be fair, that question didn't make McCoy look like a psycho weirdo, but rather made the fan look that way.