BKN said:
The are you married question is illegal. Can you do anything about it? I doubt it, if you send a little letter to his dean, they might rain on his parade. Don't do it untill after you match elsewhere.
The QUESTION is not "illegal" but rather using your answer to make decisions about the match is. Of course, maybe we're just splitting hairs because perhaps your answer to such a question does factor in, however subconsciously in the mind of the interviewer, into a program's match decisions.
One shouldn't surmise underhanded motives in these type of questions. Most of the time they are simple conversation fillers, getting to know more about you.
Nearly every place I interviewed for residency and fellowship asked where else I was interviewing. Its a pretty common question. I'm sure it is in part trying to assess your interest in the type of program they offer (ie, if its a community program and all of your other interviews are major university powerhouses), geographic considerations, etc.
Part of the process when ranking candidates is the determination of how interested the student/resident is in your program and how likely they are to come there. Programs don't operate on the same mentality as we're taught - "rank your most favored program first, even if you have no chance of matching there". Since the match favors the applicant, programs aren't likely to rank someone highly if they feel there is little chance the person will rank them highly. We can't ask you how you will rank us, so little questions about what you want in a program, geographic considerations, whether or not your married (ie, we're wondering whether or not your spouse will want to come to our little town, whether they can find a job, etc.), help us ascertain what are the chances you'll rank us. We know that applicants, especially those in more competitive fields will often interview at many places, without regard to location or program type - they often want a spot, any spot.
The message is that to expect these questions and understand the reasoning behind them. If you are very interested in a program, tell them. If you aren't and its obvious from your answers, either rethink your answer to these type of questions (if you care what the program thinks about your application) or just ignore them.