Even if you forget that the cloud is the internet and that the entire internet can reach you over the internet, it doesn't take a genius to set up a password for a cloud service. I have no idea how many of these databases are honey pots, but finding open and vulnerable servers is depressingly simple.
I suppose it's kind of liberating to know that you can be dumb enough to fling patient data into an unprotected cloud server and still get a job in IT. The bar is really set that low.