What about concert clips. Not dvds, but clips recorded by fans. Also, technically most pictures are copyrighted. I forgot which band it was, but some band got mad seeing parts of their OHPs used as avatars and layouts on LJ and fansites... therefore I assume that's not ok as well. Even tabs are... I read that on a site I used to get bass tabs from. They shut down cause it's not an official representation of the music... there could be errors.
Say I wanted to post a link to a site that is affiliated with a band that has samples of the bands music and they have that's band permission to put those samples up. That is ok... correct? :?
It's just so hard to know... sometimes the line between what is legal and illegal can be fuzzy. How can one be always sure?

I actually knew of this rule and forgot... now I feel bad.