Whilst you may be correct Orphan, I am not aware of a shift in the behaviour of ISPs and sites like YouTube in respect of legal representations from third parties. The de-facto stance is to simply tell the video poster or web site owner to remove the material.
Even if there is a precedent set by the case you mention, it has not really changed anything. Google et al are not interested in the fight and leave it up to the poster/web site owner to pursue any challenge. Most people do not have the resources to mount such a challenge and therefore the status quo remains.
I also have no idea what impact jurisdictional issues have on the matter given the borderless nature of the internet.
As to the very interesting debate raised by the OP...
I hate to say but I think much of the problem is the result of the original copyright holders not pre-empting the inevitable electronic distribution.
Had they moved to electronic distribution, perhaps even with a donation arrangement over traditional payment model then they would have created the channel for electronic delivery of the books.
I appreciate there may have been a number of reasons why this did not happen however I would submit that for many, being able to read the books electronically makes the difference between reading them and not reading them.
Personally I have no problem squaring the circle of breaking WTS copyright to ensure as many people as possible can see the detail of what has been distributed on a need to know basis within the organisation. This would extend to CoC in the hypothetical situation of the OP.
In the current situation I think it is very wrong of people to seek to make money from breaking the copyright on CoC however I also think it is inevitable that people will try and seek the books electronically and it has been a real shame there has been no official way to do this that supports both the copyright and the cost of production/distribution.