Good point, a price to pay for using a free system. Something along those lines can also be said about using Gmail but with Gmail you can at least choose to encrypt using OpenPGP or some other such software and give up your keys when served with a court order.
PS quote:
Google processes personal information on our servers in the United States of America and in other countries. In some cases, we process personal information on a server outside your own country.
So who do they answer to?