Despite what some people might like to believe, interviews do not matter that much in terms of your application. Every alumni has their own opinion and interviews are by nature subjective. This is the reason why some random person's view of you matter's extremely little to the admissions committee. They may look into comments made by the interviewer but they will not take everything as fact and make judgments based on someone's POV who is not an adcom.
That being said, if you get a likely letter and do not show enough interest in learning about Brown through a great opportunity with an alumni, they do not like this at all and the interviewer has special instructions on what to do with likely letter people if they do not want to do an interview. In other words, if you get a likely letter you are in as long as you show up to your interview and don't make an ass of yourself, as in majorly do something terrible like talk about how you hate Jews or something. The interview doesn't have that much significance for admission, it just shows your interest level and is an opportunity for you to speak with someone in person which can be very valuable. If you don't show interest and don't ever go for an interview - the interviewer has special instructions to notify admissions and they might just boot you.
Last edited by wolfmanjack; 11-15-2009 at 10:25 AM.