[EwanG]

You don't have to be tin hat to worry that if "some" Dropbox admins have access to your files, then your files are at risk of being hacked just like what happened with Sony and their PSN. If a company has your stuff, and someone there has the key to your stuff, you'd better be sure it's as important to them as it is to you. Since that is rarely the case, I prefer not to give anyone else the key.