* Who submitted this to scribd?
* Do they own the copyright?
* Do they have the right to submit it to scribd?
* Have they acted ethically?
* Have they acted legally?
Added in edit: These are, to me, legitimate and serious questions. Some time ago I posted a link here on HN to a PDF and it got automatically slurped to scribd. I didn't submit it to scribd, I don't hold the copyright, and now I find that the traffic that might have gone to the original site has been usurped by scribd.
I find that distasteful.
Pragmatically, anything you post to the web is now fair game for being duplicated elsewhere, your work being taken, possibly having ads put all over it, and generally ripped off. That's just the way it is, I know, but I find it odd that a company that seems purely to make money by ripping off other people's work is supported by HN.
But that's all I'll say. Most likely I'm in a minority in wondering about the ethics.