I applied and was deferred from Stanford EA. I applied as a 4.0 but I got two B's first semester. I doubt I'll get in, but let's say - hypothetically speaking - that I get in to Stanford or Harvard or USC or Vanderbilt. This semester, my grades are really bad. I am most likely going to finish with an A, two B's, two C's, and an F in Calculus. Will these schools revoke my admission if I were to be accepted, after receiving my second semester grades?