They cut off access to a COPY of a users content. They didn't TAKE anything from a user. If, in 2016, you're relying on a free service as your only copy of important data, you're a fool.
Countless governments across the world could literally, without any notice, delete all of your data at the drop of a hat on ANY public service. See: megaupload. It's not the job of a free service provider, who literally makes 0 promises of data integrity, to provide you unlimited access to your data until the end of time.