Copyright laws...

I totally understand the point of copyright laws. I started ranting about it, then deleted it, cuz I decided that copyright laws do make sense. I wouldn't want someone to use my pictures and claim them as their own or take my music for free and not pay me. So I guess in theory, yeah all of this stuff is important. I just am a little confused with the picture policy. I know that some pictures have to be cited, but how am I supposed to know which ones? In my brain, if it's accessible, why do I have to cite it? Cuz I know of websites where pictures are locked and are not able to be accessed without a password. So therefore, if I can access it easily, I feel like it's free game. But then again, having thought about it a little more, I realize that if I put up pictures for other people to use, I would want them to at least give me credit for it....whoa now my blog is going in circles. I think it's time to stop writing.