I was thinking about developing a website that would involved photos and was wondering how to deal with the legal/author rights aspects.

If someone could direct me to some resources to find out, I would appreciate.

If I take Flicker as an example, people can upload pictures and share them. What if someone a picture that belong to someone else, like a professional photographer?

Or what if someone upload a picture of someone and that person does not agree to that?

Same question if someone put a picture in there that is not acceptable?

Can a Disclaimer or Terms of Use avoid the Website (or the person managing a Website) to get in trouble when someone violate the law?

Thanks.