Could it be that in a case like this, (a corporation vrs a private individual) you need to show that the action was harmfull enough to cause damage, and therefore to do so you need to show that you've taken action to prevent it from happening in the future?
Well, copyright infringement involves its own statutes, and I'm not familiar with them. (My only IP experience at all comes from a series of seminars in law school.) But I'd be seriously shocked if, in order to prevent (via the justice system) the unlawful acts of others, you had to cease your own completely lawful acts.
It simply makes
zero sense, and (contrary to popular opinion) the underlying rationale of common law and statutes usually makes sense.
Let's say you've written a best-selling book, and somebody has taken a copy of it, scanned it, and started printing their own physical copies to sell. There's just no conceivable way that, in order to stop anyone from ever ripping off your book and printing their own copies, you'd have to stop selling your completely legitimate copies. (Among other things, it simply wouldn't work, for hopefully obvious reasons.)
So no, this really isn't a possibility. Nor is joethelawyers similar suggestion about mitigating damages, for similar reasons.
I'm glad you mentioned it, though, because I have a feeling this is what people have it mind when they keep talking about the PDFs being pulling due to "something to do with the case." While it's vaguely possible, through some mechanism I can't figure out, that pulling the PDFs for reasons related to the lawsuits makes sense, your suggestion (and joethelawyers) aren't the reason.
I personally suspect it has more to do, as has been suggested, with wanting to install different anti-pirating measures, and that the timing issue is just a symptom of near-complete boneheadedness.
We like to think of the Adkinson/Dancey era as the golden age, but there were quite a few massive blunders in it. (Fallen Empires, anyone?)
To be fair, Fallen Empires was, itself, a response to two sets which were blunders in the other -- way too powerful -- direction. (Legends and The Dark.) Fallen Empires was a massive
over-reaction, but, still, a reaction was needed. (Besides, I liked my Thrulls and Saprolings!)