???? They have a history of Rafa's posts. But how do they know who Rafa is? I can find all sorts of stuff about you from mdapps and your history. But if I'm looking at a candidates application, unless I have their SDN handle, it doesn't matter.
Or an Adcom can, in this their busiest time of year, look at an app and go to mdapps on the longshot that an applicant has a listing and search for an alma mater (assuming it's easy to spell: is it UC Santa Barbara, U.C. Santa Barbara, UCSB, etc. All different results). From that list, they can try to match MCAT scores. If they're successful, eureka! They have a list of what schools you've applied to. But mdapps is such a miniscule percentage of med school applicants and since they have so many apps, I really don't see them going to the trouble.