I wanted to let you know that I didn't mean to disappear without responding, but that sounddust expressed what I was thinking already so I don't have much to add. I did not know that the world-readable bit was opt-in; I think that's a good start, and I'm glad you're getting legal advice on this topic.
I am, I'm in the UK. I know the DMCA safe-harbor laws don't apply, but neither does the DMCA. Copyright law is similar everywhere, however, so I just wanted to get an idea. I have a lawyer researching this right now, though. Thanks again!
Your copyright law is similar to the US or Israel based one, not so strict as the main european one, which is based on the napolion code and is very very strict.
Thank you for the information, I'll talk to our lawyer about it just to be safe.