I'm not a photo forum owner, but have owed, admined and moderated other types of forums for 20+ years. Copyright laws vary only slightly from one country to another except for a few countries (Russia, China and several others) who don't believe in the rights of any citizen. So, depending on what country you reside in, you must comply with the law of the land. Photos uploaded to your site don't belong to you, they belong to the person who created them, or the entity that owns the rights to them (not always the same). In most cases, you can do what you want with those photos - on your own site - but beyond that, you have to honor the copyrights associated with them.Just quick question for photography forums owners. Do you have any Copyright Policy on your forum for your users ?