当interview时问你还申请了哪些学校怎么办？

If someone from Darden asks you where else are you applying and you say "Wharton, Kellogg" then you might automatically not get in (and if you say no where else they'll think you're lying).  The best comp to Darden is a place like HBS (for cases), Stanford (for size), or Tuck (for size and I think cases).
I partially disagree with your advice.  Yes, some bschool interviewers are very narrow-minded and may act as you say.  However, let's use the hypothetical example of a Darden interviewer who asks you where else you are applying.  The applicant should NOT respond by simply saying the names, Wharton and Kellogg.  If the applicant does so, he allows the interviewer to incorrectly ASSUME things about the applicant's decision-making process and his choice of schools.  An applicant must fill in the missing details -- don't leave room for the interviewer to make assumptions about you.
Here is a better way to answer the question.  Let's say the Darden interviewer asks you where else you are applying.  And let's say you really are interested in general management and are also applying to Wharton, Yale, Columbia, Harvard, and Kellogg.  The applicant should respond by saying he is applying to Harvard in addition to Darden because they are both well-known for general management.  Then, the applicant should say he is also applying to Wharton, Yale, Columbia, and Kellogg because although they may not have quite the general management reputation of a Harvard or Darden, they still have a strength in that area.  If you answer in this manner, you are accomplishing two things: (1) you are praising the interviewer's school and (2) you have given a solid, common sense reason why you have applied to your list of bschools.
This general interview approach may be applied to bschool traits such as academic specialty areas, school size, location, faculty, etc.  You must fill in the blanks or your interviewer will do it for you by (possibly incorrectly) assuming things about your choice of schools.  For example, although Duke is good for Biotech/doctors, so are MIT and Yale.  You may also apply to schools such as Tuck, Yale, Wharton, and others because you believe they have a strength in General Management although perhaps not at the level of Harvard (the same might hold true for management consulting).  In finance, Wharton and Columbia are strong but so are Yale, Stanford, and NYU.
I think an interviewed applicant must be honest, concise, and thorough.  Try not to leave room for the interviewer to assume things about you.  Leave a good impression.