I'm not crazy about anyone using my personal data online. If you don't want anyone looking at what you're uploading to the cloud, you should definitely read the terms of service; and not upload personal data. If privacy is paramount, then pay the $50/yr for a Google Apps account. Use the appropriate service for your needs. You shouldn't upload anything that you don't want others to see to ANY free account; and while I'm being Captain Obvious, don't take your wife to McDonalds for your anniversary dinner.
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