What are you talking about? Users have complete control over who they share their documents with in Drive. How is it 'evil' to provider a better UI for what people can already do (email documents to one another)?
Err... He is talking about Google having access to your files, not whoever else you choose to share them with.
Any company that deals with sensitive data probably already does not use any sharing service. If necessary you could write a custom sync app that encrypts on upload to gDrive and decrypts on download. I have worked for a company that had implemented automatic encryption on emails, including attachments (at least with it's largest clients).
Thanks camiller, I misread the post I was replying to.
In that case, my response is that that sounds awfully paranoid. Earning and maintaining our users' trust is far more valuable to us than stealing some hypothetical secret business data that someone has stored in Drive, and new engineering employees (like myself) go through extensive privacy training to ensure we don't/can't do anything that would be a breach of our privacy policy. As it turns out Googlers have the same concerns about privacy as everyone else here, and we design all of our user-data storage systems with privacy as a key design goal.
it's evil what they'll do with your files. one likely step is fishing expeditions by ICE looking for people who have illegal copies of movies or songs on their gdrive.