In such a case wouldn't any form of proxying be copyright infringement, even without modification be copyright infringement?
There are also other applications of modification of pages in transit, for example mobile connections often proxy a lower quality version of images (done transparently by the ISP) to save bandwidth. Also some proxies may block videos , ads etc which is as much modification as adding them.
There are also other applications of modification of pages in transit, for example mobile connections often proxy a lower quality version of images (done transparently by the ISP) to save bandwidth. Also some proxies may block videos , ads etc which is as much modification as adding them.