Pkit, I disagree. What relevance does it have at all? When you interview for a job do you tell them you're going down the street to interview with their competitor an hour after you leave? Of course not. There is nothing unethical with not disclosing something that's not relevant to my application. I think Cornell asks what other schools you are applying to in their application, Columbia does not. With that being said, there is no difference... and simply put, Columbia STILL gets my official report from GMAC with what they need.. I'm just providing a screenshot of my "unofficial" performance.
Also, consider this... schools are big on fit and many have different cultures. If you had a school like MIT, Tuck, Columbia, Harvard, and hm, CMU let's say... and you send that to Tuck... well they can see by the list that you're not focused on a specific niche offering or type of class. Said different, if Tuck cared and saw HBS and you mention in an essay you want small class sizes that fosters community... doesn't where you sent your reports argue against that? Appears you're just out for any top program. The ethics here is a bad argument and one that I would disagree with you on completely.... and honestly, this is coming from someone who is very involved in my undergrad ethical debate organization (was during and post studies) and considers myself to uphold highest standards. There is nothing wrong with not showing someone something they didn't ask for... especially when you consider the alternative.
Oh and on a side note, apparently CBS doesn't care either based on my admit