Dropping two stars for honesty. Dropbox creates contact lists from your email contacts without asking your permission. When you use Dropbox's "Invite by email" widget to invite friends, Dropbox keeps the email addresses as a contact list within your Dropbox account. When you go to share a folder and begin typing a name, several names from your email contacts appear. Dropbox does not allow you to remove those names, even if most are people with whom you would never share. Don't type too fast when sharing!