I'm not really sure if the copyright is a problem though. I know fistfulofwesterns just won a case but it was about the text on his site far as I know. I know the guy keeping the site doesn't want others to use the images there without permission... BUT... I would think those things (lobby cards, posters) on his site and other sites would be copyrighted to someone else (and even if they aren't, I wonder if anyone actually knows for sure ;D ). Just because someone scans or takes a photo of something doesnt really make him the copyright owner of the poster art or lobby photos, so how can anyone ask somebody else to respect scan copyrights if the scan itself is already illegal?
Yet personally I always try to (If I know who has made what) give credit to original scanners and even ask for permission and would recommend this site (and everyone) to do that as well.
But still, I would like to see someone trying to sue somebody over a lobby card scan while the lobby card itself is actually copyrighted to some movie corporation and have been scanned and published on the internet without asking permission. ;D
Maybe fair use laws might make it legal to display somekind of scans, but if the copyrights still remain in whoever owns the art or photos I wonder if the scanner can actually have any kind of power to who uses the scan.
Not that I know for sure, so anyone is welcome to correct me.