It's a simple way to remove content so it, I assume, acts as a way for IA to claim carrier protections under USA's DMCA, and to limit damages in other jurisdict

It's a simple way to remove content so it, I assume, acts as a way for IA to claim carrier protections under USA's DMCA, and to limit damages in other jurisdictions. What they do is certainly tortuous infringement in UK - and probably most jurisdictions AFAICT (based on Berne Treaty, say), but it's so easy to remove your domains from IA that courts will be loathe to award much in damages. AIUI they block access but don't delete the info; Fair Use/archival laws in USA probably make that lawful.