Curiosity, would copyright laws prevent someone from posting pictures in this manner if they weren't claiming them as their own? Im not disputing it, I was just curious, as many people daily put pictures in posts on BBs.
It depends. Some pictures are in the public domain and can be freely posted without violating copyright. Others, such as in books, or noted on a business or personal WEB site, cannot be posted without epxress consent from the copyright holder.
Typically, the pics with a copyright imbedded in them require consent to be used. I have had more than a few people contact us about copyright violations and have had to deal with that.
People need to stay aware. Just because it is on a WEB page does not make it free to use.