Arguably the largest "archival library" today, with respect to current and recent (last few decades) online (and some other) content, is archive.org . Where re

Arguably the largest "archival library" today, with respect to current and recent (last few decades) online (and some other) content, is archive.org . Where retroactively blocking a source URL (via robots.txt) causes archive.org to make its archival copies of/from that URL inaccessible. Supposedly, this is going to change. But it's obvious that lawyers will continue to explore and push the boundaries of this. The Web ('Net) is not a library. And datahoarders have a point, beyond just the stereotype of compulsive collecting. (I'm not one, but I'm increasingly regretting not having grabbed some resources while they were up.)