I'm oblivious to EU laws and precedent regarding this, but I wonder if this case would have an (positive?) legal implications for TOR exit node operators...
The most interesting part of the opinion, in my view, was the clear statement that someone offering free public Wi-Fi to their customers did so as part of the "economic context" of their shop, even though they do not charge directly for it.
The reason why this is important is that the shielding law in question here — Art. 212, directive 2000/31/EC — can be invoked only by those providing an "information society service". This is defined as:
"any service normally provided for remuneration, at a distance, by means of electronic equipment for the processing (including digital compression) and storage of data, and at the individual request of a recipient of a service"
As you'll have noticed, to be protected, the service must be "provided for remuneration". In this opinion, the Advocate General argues that it need not be direct remuneration, and that a link to a broader economic context is sufficient. This is logical, in the sense that it follows previous decisions, but it is an important clarification. (There is a previous decision, for example, (Papasavvas) which held that a website funded by advertising was an "information society service", even though the remuneration to the sites comes not directly from the site's users, but from the advertising broker.)
The Advocate General expressly stated that he was not considering the situation where there was no other economic context.
There is no specific European case law relating to the liability of someone running a Tor exit node. However, following the principles of the opinion (not yet a court ruling) here, someone running a Tor exit node would probably be well-advised to try to bring their activities within the scope of an economic context. That could be running the exit node alongside some other business, or offering subscription plans (well, supporter plans, I suspect) for would-be users of Tor (even if not of that specific exit node) to contribute to the running of the system, or something else which made it part of an economic activity. Someone running a Tor exit node, or an open Wi-Fi connection, from their home network, without an economic context, looks unlikely to be shielded by this law, if the court chooses to follow the Advocate General's ruling.
(My general comments on the opinion are here.)