What about bloat of the block chain? Its going to happen sooner or later but if people start uploading files that they want to archive won't it hasten the inevitable? Think of somebody's 3 tera byte porn collection that they just want to ensure access to it with a nice safe back up on the blockchain. Just to be clear, I'm not against it, just want to think things through first. I'd love to hear your thoughts on this.
Also, if you need 2 more test documents, I suggest the US constitution and the patriot act. Maybe putting these documents side by side will get people thinking. Kinda where we started and where we are now.
There are protections in the blockchain that prevent people from putting too much in, too quickly, based on the amount of SP they hold.
That said, the blockchain will still get quite large. Fortunately, storage is quite cheap.