Well I suppose since everyone is jumping on this guy, I'll play a little devil's advocate.
For one, do all these people who are upset, are you equally interested in going to every single school you applied to? Are there schools you listed on your amcas that might have higher acceptance rates, lower average test scores/gpas, or otherwise provide you with a better chance of acceptance, that you applied to at least in large part for those reasons? And having said that, you would still be happy to go there because there is clearly something that appeals to you from that school and you'd be getting your chance to carry out your dream of practicing medicine; you obviously respect the school at least to the degree that you're investing the effort and money to complete the application process. Sure, for some people, a "backup" might be another person's dream school. That's true no matter what you're applying for. And I think maybe the issue here is the term "backup" or "safety" school. I wouldn't use those terms myself; I'm in the majority that thinks no such thing applies to medical school. So perhaps I'd say maybe there's some cause for being upset in the guy's post. But I sense the point he was trying to make and part of me agrees with him.
Ask yourself, why have people been saying that the admissions people at Wake have asked them "What is your specific interest in our school?" Is it not, at least in part, based on the very principle that this poster was mentioning? To ascertain whether the applicant has a very serious interest in the school, one beyond having added it to their amcas as one of three dozen schools simply to increase their chances of getting into medical school? Anyhow, I hope this doesn't make me the target of anger that this other fellow has received. But I just wanted to give a differing point of view. And although I understand the frustrations of reading what he said, I also believe he was just giving his honest opinion and probably wasn't intending to offend so many people.
Edit: Applying to medical school has a learning curve itself. It's my belief now that Wake is hardly a safety school no matter who you are. But when originally applying, not completely knowing the ins and outs of the system, I think it would have been reasonable for some people to originally think of Wake (or other strong schools outside the top 20) in that sense.