But in most environments, you as a user are not in total control of what is running. If you are in the cloud, other users in unrelated virtual machines can stea

But in most environments, you as a user are not in total control of what is running. If you are in the cloud, other users in unrelated virtual machines can steal your junk. Also, if you are running a web browser with JavaScript turned on, that is effectively another user able to steal your junk.