Ask HN: How do I protect buckets in Google cloud storage?

Using a google cloud storage bucket to store some images that will be served to customers. From the google cloud platform console, it seems that it's very easy to delete a bucket - even if it has some objects in it. Just by selecting the bucket, hitting delete, and confirming. I can't find anything about strategies for backing up or securing these buckets. Any tips? How do you secure/backup your gcs or s3 buckets?