NO - DO NOT DO THIS!!!! Trust me on this. I am a former admission officer at a Top 5 university. Programs actually do spot checks where they compare lists of enrollees, and if anyone is double deposited, they will rescind admission to both programs because it's considered an honor code violation. Just get in touch with the people to request an extension due to mitigating circumstances. It's really not worth it to have your offers taken away and your name on a blacklist at those universities. This really does happen, more times than you realize, and it's just awful. DO NOT DO IT.